Journal articles: 'Casting technology'

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Odilov, Furkat, and Farrukhjon Abdullaev. "Improving The Technology Of Continuous Casting Of Steel Castings." American Journal of Engineering And Techonology 03, no. 04 (April 30, 2021): 108–17. http://dx.doi.org/10.37547/tajet/volume03issue04-17.

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This article describes the quality and cost-effectiveness of converting steels by melting them in electric arc furnaces. In addition, the technology of continuous casting of cast products in the furnace with the help of ferroalloys, followed by various equipment.

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Shopina, E., and M. Markova. "KASLI ART CASTING TECHNOLOGY." Technical Aesthetics and Design Research 2, no. 2 (December 16, 2020): 29–36. http://dx.doi.org/10.34031/2687-0878-2020-2-2-29-36.

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The Kasli art casting technology is characterized by its uniqueness; the products are distinguished by precision of execution and uniqueness of style. The Kasli Casting Plant occupies a well-deserved first place in Russia in terms of quality and quantity of products. The object of the research is the features of each of the stages when creating of Kasli castings, as well as the distinctive features of the art casting technology. As a result of the study, the conclusion was formulated that the historical role of Kasli art casting is its influence on the decorative and applied art of Russia. According to the authors, the Kasli plant influenced the further production of castings, producing high-quality products with careful study of details, ensuring a high level of quality for the foundry workers

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Skorulski, G. "3DP Technology for the Manufacture of Molds for Pressure Casting." Archives of Foundry Engineering 16, no. 3 (September 1, 2016): 99–102. http://dx.doi.org/10.1515/afe-2016-0058.

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Abstract The paper presents the use of rapid prototyping technology of three dimensional printing (3DP) to make a prototype shell casting mold. In the first step, for identification purposes, a mold was prepared to enable different alloys to be cast. All molds being cast were designed in a universal CAD environment and printed with the zp151 composite material (Calcium sulfate hemihydrate) with a zb63 binder (2-pyrrolidone). It is designated to be used to prepare colourful models presenting prototypes or casting models and molds. The usefulness of 3DP technology for use with copper alloys, aluminum and zinc was analyzed. The strength of the mold during casting was assumed as a characteristic comparative feature in the material resistance to high temperature, the quality of the resulting casting and its surface roughness. Casting tests were carried out in vacuum – pressure casting. The casting programs applied, significantly increased the quality of castings and enabled precise mold submergence. Significant improvement was noted in the quality compared to the same castings obtained by gravity casting.

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Boroń, Kinga. "Evaluation of porosity of AlZn5Mg castings made by squeeze casting technology." Acta Innovations, no. 32 (July 1, 2019): 12–19. http://dx.doi.org/10.32933/actainnovations.32.2.

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The paper shows the results of research aimed to assess the impact of high squeeze pressure on the porosity of AlZn5Mg alloy castings, including its distribution in slab-type castings with dimensions of 25 x 100 x 200 mm. The research was carried out on castings made by two methods: squeeze casting and gravity casting. The pressing was conducted at a pressure of 100 MPa at an initial mould temperature of 200°C. The research identified the middle and outer parts of the casting. Experimental research was preceded by numerical simulation of the casting solidification, then a porosity assessment was carried out using the hydrostatic weighing method, which was supplemented by structural observations. The results of the research showed a two-fold decrease in the porosity in the middle part of the casting which is most exposed to the occurrence of shrinkage voids formed in the final clotting phase. Structural tests revealed the occurrence of dispersed porosity in castings, mainly of shrinkage and / or shrinkage-gas origin. The impact of pressure of 100 MPa during solidification caused fragmentation of the primary structure of castings, which resulted in a higher grain density.

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Semanco, Pavol, Marcel Fedák, Miroslav Rimár, Peter Skok, and Emil Ragan. "Equation Model of the Cooling Process in High Pressure Die-Casting Technology." Advanced Materials Research 505 (April 2012): 165–69. http://dx.doi.org/10.4028/www.scientific.net/amr.505.165.

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In the die-casting technology there is very necessary to determine cooling process of castings in metallic mold especially in the case of castings with great weight to achieve quality surface and properties of the casting without any defects. To regulate cooling in the time course, it is desirable to develop equation of regulation system that determining mold temperature dependence on casting temperature. In the paper we proposed model of regulatory system in the cooling process of casting in a mold that is based on an analysis of amplitude, phase and transition characteristics. The result is presented as proposal for regulatory circuit to control cooling process of casting in the mold.

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Dong, Yi, Xiao Ming Fan, and Bin Liu. "Numerical Simulation and Technology Optimization of Rear Oil Seal Bearing Die Castings Based on ProCAST." Advanced Materials Research 189-193 (February 2011): 4008–13. http://dx.doi.org/10.4028/www.scientific.net/amr.189-193.4008.

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In production,the Φ105 mm hole of rear oil seal bearing die castings often appear porosity, shrinkage and other defects , resulting in the parts to scrap. The existing gating system design of rear oil seal bearing die castings was improved , and the flow and temperature field of the two programs that before and after improvement were analyzed by ProCAST software. The simulation results predicted the casting defects, and the conclusion was consistent with the production. By using the improved process optimization, the rejection rate of die castings can be reduced effectively. Die casting is a chipless forming of casting with high casting dimensional accuracy, high surface quality and high production efficiency [1,2]. Therefore, it has developed rapidly in the automotive, communications and other industries. However, due to shrinkage, porosity and other reasons, leading to high rejection rate of castings. With the emergence of commercial casting simulation software, the casting production has been developed from semi empirical and semi theoretical onto theorization, quantification and controllable track[3-5]. In this paper, the casting defects of rear oil seal bearing is analyzed by using numerical simulation technology[6]. By optimizing the casting process, the casting quality is improved, and the rejection rate is reduced effectively.

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Mao, H. K., H. Xu, and L. Xue. "Automotive Riser System Design Technology Based on CAE." Advanced Materials Research 215 (March 2011): 344–50. http://dx.doi.org/10.4028/www.scientific.net/amr.215.344.

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For the sake of achieving the feeding system to be automated designed, the automatic merging model of the casting hot spot set up based on Casting CAE, and based on this model the riser and cold-iron designs can automatically be completed. The CAD/CAE software system was developed for the steel casting, and the feeding system of the side frame casting was designed by the software. according to the process parameters that were provided in the paper, the sample casting was poured and dissected to determine the volume of shrinkage cavity of sample castings. The results showed that no shrink defect exists in the casting, so it proved that the model was reliable for the riser and cold iron design.

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Chen, Hong Ze, Hong Zhao Dong, and Zhong De Shan. "Numerical Simulation and Optimization Technology of Lost Foam Casting." Advanced Materials Research 936 (June 2014): 1681–86. http://dx.doi.org/10.4028/www.scientific.net/amr.936.1681.

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The filling and solidification process of casting that is closely related to lots of casting defects and has significant effect on the mechanical properties of castings. In this paper, the research status and development direction of numerical simulation technology of casting, especially of lost foam casting were reviewed and discussed. Also a brief introduction of the basic situations and product characteristics of several outstanding cast filling and solidification simulation softwares were summarized. In addition, the actual domestic application status of numerical simulation technology of lost foam casting in the foundry enterprises was analyzed and some suggestions were given as well.

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Liao, Dun Ming, Li Liang Chen, Jian Xin Zhou, and Rui Xiang Liu. "CAD/CAE Technology and its Application on Nonferrous Alloy Casting." Advanced Materials Research 139-141 (October 2010): 1113–16. http://dx.doi.org/10.4028/www.scientific.net/amr.139-141.1113.

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The nonferrous alloy castings will be much demanded with the development of aerospace, light-weight weapons and automotive industry. Casting CAD/CAE technology has played an increasingly important role in foundry. It can help technician to design casting process and simulate heat transferring and molten metal flowing before actual production. Firstly, the main contents and basic principles, mathematical models of casting CAD and CAE were introduced. Secondly, the casting CAD/CAE technology route was interpreted, and then several CAD/CAE applications of casting process design and simulating were carried out on nonferrous alloys, such as aluminum, magnesium and copper. The results indicate that CAD/CAE technology can be applied to casting process design and predict casting defects which usually occur during the casting mold filling and solidification process, it can provide references to optimize casting process, so as to improve casting quality, reduce the rejection rate and shorten the development cycle of new products.

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Gaspar, Stefan, and Ján Pasko. "Analysis of Fracture Process and Common Defects in Casting Alloys EN43100 Manufactured by Die Casting Technology." Advanced Materials Research 1077 (December 2014): 39–43. http://dx.doi.org/10.4028/www.scientific.net/amr.1077.39.

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Recent research in the process of die casting production of aluminium alloys which are nowadays deeply implemented in the rapidly developing automobile, shipping and airline industry aims to increase the manufacture and quality properties of the casting in order to obtain its high mechanical properties at acceptable economic costs. In terms of ensuring the quality indicators in the production of aluminium castings it is necessary to pay close attention to internal structural quality of the castings characterized by type and extent of foundry defects (cavities, Al2O3 particles, internal cold laps). The presenting contribution deals with the analysis of the fracture process, the microorganism disturbance of test samples, the impact of casting speed on the occurrence and extent of the castings porosity and reasons for the internal foundry defects of casting alloys EN 43100 manufactured by die casting technology.

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Ruan, Xiao Fang. "Quality Control System for Die Castings Based on Statistic Analysis." Applied Mechanics and Materials 246-247 (December 2012): 918–23. http://dx.doi.org/10.4028/www.scientific.net/amm.246-247.918.

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Die casting technology is applied widely for mass production of non-ferrous metal parts. How to guarantee the quality of die castings is always a concerned topic. A quality control system for die casting machine was developed based on statistical analysis of technology parameters. Firstly the original data is acquired from die casting machine and the technology curves are displayed. Secondly, the technology parameters are identified automatically and a database of technology parameters is established. Thirdly, a statistical analysis based on the database is performed. The statistics parameters of expecta -tion and deviation are figured out and the probability distribution diagrams for technology parameters are displayed. Finally, Tolerances for technology parameters are figured out and then the system will monitor the die casting process according to the tolerances. A practical system realization in a die casting machine is demonstrated by its monitoring interfaces. Statistical information and on-line monitoring provided by this system are helpful to guarantee the quality of die castings.

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KITAOKA, Sanji. "Melting and casting technology of recent aluminum alloy castings." Journal of Japan Institute of Light Metals 43, no. 11 (1993): 567–73. http://dx.doi.org/10.2464/jilm.43.567.

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Noguchi, T., K. Asano, S. Hiratsuka, and H. Miyahara. "Trends of composite casting technology and joining technology for castings in Japan." International Journal of Cast Metals Research 21, no. 1-4 (August 2008): 219–25. http://dx.doi.org/10.1179/136404608x361981.

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Kordas, P. "Influence of the conditions of casting and heat treatment on the structure and mechanical properties of the AlMg10 alloy." Journal of Achievements in Materials and Manufacturing Engineering 1, no. 83 (July 1, 2017): 26–32. http://dx.doi.org/10.5604/01.3001.0010.5137.

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Purpose: Assessment of the possibilities of shaping the structure and improvement of mechanical properties of casting from AlMg10 alloy through a selection of casting technology and precipitation hardening. Design/methodology/approach: the work evaluated the impact of casting and heat treatment technology on the mechanical properties and structure of AlMg10 alloy castings. The tests were performed on 200 mm × 100 mm × 25 mm plate castings produced by gravity casting methods for sand and metal moulds and by a liquid state press moulding technology. Castings made with these technologies solidify in substantially different heat- evaporation conditions and exhibit varying degrees of primary structure fragmentation. Metallographic and strength tests were performed on raw castings and after heat treatment. Findings: The changes in the morphology and size of primary crystals and the dispersion of the reinforcing phase according to the casting solidification rate and the precipitation hardening treatment were analyzed. Solidifying castings in the form of sand show a globular structure, whereas in die and press castings, a typically dendritic structure occurs, with the dendritic crystals in pressed castings being much smaller in size than the die castings. In castings which were not heat-treated, the reinforcing phase of Al3Mg2 occurs in interdendritic spaces, and its dispersion increases with the rate of cooling. After supersaturation and ageing treatments, the phase α has a grain structure in all samples. The largest dispersion of reinforcing molecules is characterized by press castings. In a raw state, the highest mechanical properties are shown by castings made in the form of sand and the method of pressing in a liquid state. Heat treatment of AlMg10 alloy castings significantly influences the increase of mechanical indexes in all castings investigated. The highest features of Rm are approx. 330 MPa and A5 above 10% is obtained in castings made by the press method. Research limitations/implications: Particular attention should be paid to the avoidance of the effects of slag inclusion, shrinkage and magnesium oxidation during casting of AlMg10 alloys. In die castings of a plate type, due to own stresses, a significant decrease in mechanical properties occurs. Practical implications: The most advantageous mechanical properties of AlMg10 alloy castings are obtained by using liquid-state pressing technology. In addition, this technology makes it possible to produce thin-walled castings of high dimensional accuracy, high air- tightness, fine grain structure, lack of surface defects and low roughness. Originality/value: The paper presents the possibility of improving the mechanical properties of AlMg10 castings by applying heat treatment. It has been proven that the casting method has a significant effect on the mechanical properties of the castings.

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Mao, Hong Kui, Bin Ye Yao, and Hong Xu. "Casting Filling Simulation Technology Based on Component Wise Splitting Method." Applied Mechanics and Materials 395-396 (September 2013): 1199–205. http://dx.doi.org/10.4028/www.scientific.net/amm.395-396.1199.

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The casting filling numerical simulation technology is of great significance to optimize the casting process, improve castings quality, and reduce production costs. Component wise splitting method only uses a small amount of iterations between velocity field and pressure field, so it has high computational efficiency in theory. The calculation accuracy is analyzed through Lid-driven cavity flow model, the result has a good agreement with literature results in low Reynolds number, but there is a big deviation when high Reynolds number. Finally the fraction step method is applied to the solution of the low pressure casting filling process, Calculation results coincided with the experimental results.

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Binczyk, F., J. Cwajna, P. Gradoń, M. Mańka, and R. Findziński. "Surface Modification of Cored, Thin Walled Castings of Nickel Superalloy IN-713C." Archives of Foundry Engineering 15, no. 3 (September 1, 2015): 17–20. http://dx.doi.org/10.1515/afe-2015-0051.

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Abstract In current casting technology of cored, thin walled castings, the modifying coating is applied on the surface of wax pattern and, after the removal of the wax, is transferred to inner mould surface. This way the modification leading to grain refinement occur on the surface of the casting. In thin walled castings the modification effect can also be seen on the other (external) side of the casting. Proper reproduction of details in thin walled castings require high pouring temperature which intensify the chemical reactions on the mould – molten metal interface. This may lead to degradation of the surface of the castings. The core modification process is thought to circumvent this problem. The modifying coating is applied to the surface of the core. The degradation of internal surface of the casting is less relevant. The most important factor in this technology is “trough” modification – obtaining fine grained structure on the surface opposite to the surface reproduced by the core.

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Gaspar, Stefan, Jan Pasko, and Slavko Pavlenko. "Research on the Impact of Increase Pressure on the Homogeneity of the Cast in Die Casting Technology." Advanced Materials Research 1091 (February 2015): 77–82. http://dx.doi.org/10.4028/www.scientific.net/amr.1091.77.

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The production of die castings cast into a metal mold has in recent years achieved an expansive growth in the volume as well as the range of production and that is particularly in aviation and automobile industry. In the process of die casting the final quality of a cast is influenced by a great number of factors. The main factors of die casting are: pressing velocity, increase pressure, the melt temperature and the mold temperature. A primary criterion for achieving reliability, efficiency and quality of production is to ensure minimization of the castings defects occurrence in castings correct setting technological factors of die casting. The presented paper deals with the experimental assessment of the impact of increase pressure on the mechanical properties and homogeneity of a die cast.

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Jelínek, P., and E. Adámková. "Lost Cores for High-Pressure Die Casting." Archives of Foundry Engineering 14, no. 2 (June 1, 2014): 101–4. http://dx.doi.org/10.2478/afe-2014-0045.

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Abstract Development of salt cores prepared by high-pressure squeezing and shooting with inorganic binders has shown a high potential of the given technology even for high-pressure casting of castings. Strength, surface quality of achieved castings, and solubility in water become a decisive criterion. The shape and quality of grain surface particularly of NaCl - cooking salts that can be well applied without anticaking additives has shown to be an important criterion. Thus the salt cores technology can cover increasingly growing demands for casting complexity especially for the automobile industry.

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Tkachenko, S. S., V. O. Emelyanov, and K. V. Martynov. "Modern technology of investment casting for the production of artistic castings." Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY), no. 1 (March 26, 2021): 49–52. http://dx.doi.org/10.21122/1683-6065-2021-1-49-52.

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The publication describes modern methods of production of fine plastic art castings. The stage of production of the smelted model and development of casting technology is considered. The theoretical basis for obtaining smelted models of a given quality is given. The review of technologies of production of standard castings is presented.

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Yu, Lin Hui, Ming Gang Shen, Ji Dong Li, Yi Yong Wang, Jian Ming Su, and Chu Fei Han. "The Technology Study of Steel Belt Feeding Machine of Crystallizer of Continuous Casting." Applied Mechanics and Materials 727-728 (January 2015): 513–16. http://dx.doi.org/10.4028/www.scientific.net/amm.727-728.513.

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Crystallizer steel belt feeding technology make use of melt’s fusion decalescence, controlling the distribution of melt temperature field, restrain the columnar crystal’s growing to eliminate the composition segregation and internal loose of continuous casting. And it will improve the continuous casting’s quality. By discussing the effect of casting speed, the size of steel, casting section and other factors on the steel belt feeding speed, making comparison of different casting section get strip suitable feeding speed and range of strip size, combining with a steel for steel strip feeding test mold, its theoretical and practical production results the basic agreement

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Macků, M., and M. Horáček. "Applying RP-FDM Technology to Produce Prototype Castings Using the Investment Casting Method." Archives of Foundry Engineering 12, no. 3 (September 1, 2012): 75–82. http://dx.doi.org/10.2478/v10266-012-0085-y.

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Abstract The research focused on the production of prototype castings, which is mapped out starting from the drawing documentation up to the production of the casting itself. The FDM method was applied for the production of the 3D pattern. Its main objective was to find out what dimensional changes happened during individual production stages, starting from the 3D pattern printing through a silicon mould production, wax patterns casting, making shells, melting out wax from shells and drying, up to the production of the final casting itself. Five measurements of determined dimensions were made during the production, which were processed and evaluated mathematically. A determination of shrinkage and a proposal of measures to maintain the dimensional stability of the final casting so as to meet requirements specified by a customer were the results.

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SATOH, Takashi. "New technologies of aluminum castings. The latest technology of die casting and low pressure casting process." Journal of Japan Institute of Light Metals 47, no. 11 (1997): 591–97. http://dx.doi.org/10.2464/jilm.47.591.

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Wang, Lin, Jian Xin Zhou, Hong Tao Tang, and Dun Ming Liao. "Research and Development of Steel Casting CAD/CAE Integration Technology Based on the Neutral STEP File." Applied Mechanics and Materials 541-542 (March 2014): 524–29. http://dx.doi.org/10.4028/www.scientific.net/amm.541-542.524.

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The casting process CAD system developed based on the existing three-dimensional CAD software has many inadequacies. This paper innovatively puts forward the steel castings three-dimensional casting process CAD system based on neutral STEP file. In this study, by taking advantage of universal CAD data-exchange standard STEP format for data exchange, a practical three-dimensional CAD system was developed based on Open CASCADE Geometry Kernel. The system has the function of practical casting process modeling, including design and modeling of gating system and riser design and so forth. The system exceeded the deficiencies of the existing casting process CAD system. It resolves the foundry Enterprises dependence and limitations on the type and version of commercial 3D CAD software, enabling to realizethe integration of CAD and CAE on casting process.

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Piekło, J., and M. Maj. "Methods of Additive Manufacturing used in the Technology of Skeleton Castings." Archives of Metallurgy and Materials 59, no. 2 (June 1, 2014): 699–702. http://dx.doi.org/10.2478/amm-2014-0114.

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Abstract Rapid development of the methods of additive manufacturing (AM) introduces a number of changes to the design of foundry equipment. AM methods are of particular importance in the development of technology to make small lots of castings or single cast items of complex shapes, such as skeleton castings manufactured also by means of other technologies [1]. AM methods create the possibility of making single-use moulds, cores and wax patterns, as well as patterns made from plastics for repeated use. The development of AM techniques gives theoretically unlimited possibilities in the choice of the designed casting configurations. This fact can be used during the analysis of casting mechanical properties based on the methods of topology optimisation [2], [3], [17], when the said optimisation carried out at the initial stage of design ”matches” the shape of parts to the field of stresses or displacements caused by external load and fixing mode. The article discusses the possibilities and advantages that result from combining the new methods of shaping the casting endurance with AM technologies.

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Chen, Xiao Li, Hong Wei Shi, Xiao Guang Song, Hong Chao Wang, and Hao Gong. "Casting Transformers APG Manufacturing Technology." Advanced Materials Research 1002 (August 2014): 65–68. http://dx.doi.org/10.4028/www.scientific.net/amr.1002.65.

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The APG (Automatic Pressure Gelation) process of epoxy resin casting transformer had been studied in this paper, which was developed toward epoxy resin vacuum casting process. The raw materials, mold, the differences with vacuum casting process,casting process with its parameters were introduced. Also the factors that influences the partial discharge experiment of transformer were analyzed,especially the body making and casting processes.

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Chen, Song, Da Quan Li, Fan Zhang, You Feng He, Qiang Zhu, Yi Li, and Hai Xia Cui. "Development of Semi-Solid Die Casting Process Technology for Aluminium Alloy Clamp." Materials Science Forum 850 (March 2016): 642–48. http://dx.doi.org/10.4028/www.scientific.net/msf.850.642.

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Compared with traditional liquid and solid processing methods, semi-solid die casting process can apparently overcome shrinkage cavity and porosity defects in castings and high deformation resistance and high residual stress shortcomings in forging parts. Semi-solid die casting process with advantages such as high efficiency and low cost, will become the optimal process for high quality automobile parts. In this study, using the clamp as an example, the author introduced product structure optimization and die design for semi-solid die-casting process of aluminum alloy in a new product development.The Computer Aided Engineering technology was applied to the product structure optimization according to the stress analysis. The optimal mold structure, including cavity layout, gating system, overflow and vent systems, were confirmed based on the die design criteria for traditional die casting, combining with the characteristics of semi-solid forming and the simulation results. The semi-solid aluminum alloy clamp parts with excellent performances were finally developed successfully by means of product structure optimization, die design, parameters optimization of die casting process, and the mechanical properties test of products.The existing parts were optimized to make them more suitable for semi-solid die casting processing. In addition, a reasonable die design specially for semi solid processing was an important guarantee for a successful semi solid product applied in industry. Computer numerical simulation was applied in product structure design for semi-solid die casting, die design, die-casting process optimization and other aspects, to shorten the development cycle of new product, reduce cost and improve efficiency.

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Garbacz-Klempka, A., Z. Kwak, P. L. Żak, M. Szucki, D. Ścibior, T. Stolarczyk, and K. Nowak. "Reconstruction of the Casting Technology in the Bronze Age on the Basis of Investigations and Visualisation of Casting Moulds." Archives of Foundry Engineering 17, no. 3 (September 1, 2017): 184–90. http://dx.doi.org/10.1515/afe-2017-0113.

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AbstractDuring excavation of the cremation cemetery of urnfield culture in Legnica at Spokojna Street (Lower Silesia, Poland), dated to 1100-700 BC, the largest - so far in Poland – a collection of casting moulds from the Bronze Age was discovered: three moulds for axes casting made out of stone and five moulds for casting sickles, razors, spearhead and chisels, made out of clay. This archaeological find constituted fittings of foundrymen’s graves. In order to perform the complete analysis of moulds in respect of their application in the Bronze Age casting technology analytical methods, as well as, computer aided methods of technological processes were used. Macroscopic investigations were performed and the X-ray fluorescence spectrometry method was used to analyse the chemical composition and metal elements content in mould cavities. Moulds were subjected to three-dimensional scanning and due to the reverse engineering the geometry of castings produced in these moulds were obtained.The gathered data was used to perform design and research works by means of the MAGMA5software. Various variants of the pouring process and alloys solidification in these archaeological moulds were simulated. The obtained results were utilised in the interpretation of the Bronze Age casting production in stone and clay moulds, with regard to their quality and possibility of casting defects occurrence being the result of these moulds construction.The reverse engineering, modelling and computer simulation allowed the analysis of moulds and castings. Investigations of casting moulds together with their digitalisation and reconstruction of casting technology, confirm the high advancement degree of production processes in the Bronze Age.

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Stradomski, G., M. Nadolski, and Z. Stradomski. "Technological Assessment of the Possibility of Making Light-section Castings of GX2CrNiMoN25-6-3 Cast Steel by the Centrifugal Casting Method." Archives of Foundry Engineering 15, no. 3 (September 1, 2015): 57–60. http://dx.doi.org/10.1515/afe-2015-0060.

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Abstract The paper presents the results of investigation into the technological possibility of making light-section castings of GX2CrNiMoN25-6-3 cast steel. For making castings with a wall thickness in the thinnest place as small as below 1 mm, the centrifugal casting technology was employed. The technology under consideration enables items with high surface quality to be obtained, while providing a reduced consumption of the charge materials and, as a result, a reduction in the costs of unit casting production.

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Yang, Da Chun. "Influence of Casting Process for Technological Yield of Thin Wall Steel Castings by Last Solidifying Feeding Mechanism." Advanced Materials Research 538-541 (June 2012): 1134–37. http://dx.doi.org/10.4028/www.scientific.net/amr.538-541.1134.

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For the steel castings which is thin wall, uniform thickness, complex structure, and no special mechanical properties, it is feasible that the foundry technology was designed according to the last solidifying feeding mechanism. Adopting this process for the thin wall steel castings, the pouring temperature must be controlled and the gating system be designed rationally. Using self-feeding shrinkage in solidification, and the casting was poured and congealing at the same time. The shrinkage of finally congealing part was fed by small riser or gating system (no riser). Using this foundry technology, the casting process yield and surface quality of casting may be improved, the production cost is reduced, and the requirements of mechanical properties can be met.

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Govender, Gonasagren, L. Ivanchev, N. Jahajeeah, and R. Bëan. "Application of CSIR Rheocasting Technology for the Production of an Automotive Component." Solid State Phenomena 116-117 (October 2006): 501–4. http://dx.doi.org/10.4028/www.scientific.net/ssp.116-117.501.

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The Council for Science and Industrial Research has developed and patented a rheocasting process. The process involves the preparation of semi-solid slurries from liquid metal, by controlled cooling and MHD stirring using induction coils. An industrial prototype was designed and built to test the system in an industrial environment. A semi-solid high pressure die casting cell was set up with an industrial partner and the system was tested under normal production conditions. The production cell consisted of the CSIR rheocasting system, a six axis robot, dosing furnace and 400 ton H-400SC shot controlled Bühler HPDC machine. An engine mounting bracket originally designed for liquid HPDC was redesigned for SSM forming (casting) taking into consideration the flow and thermal behaviour of semi-solid casting process, the function of the component and the required mechanical properties. Although a full production run was not completed due to an ancillary equipment failure, sufficient castings were produced to perform preliminary evaluation of the components. The processing parameters used were, die temperature of 250°C, SSM casting temperature of 580°C ±1Cº and a piston injection velocity of 0.13 m/s. Initial evaluation showed evidence of casting defects due to a combination of factors: die design/manufacture, casting parameters and poor foundry practice. From the mechanical tests it was evident that if the die design, casting parameters and foundry practice are optimized components with adequate mechanical properties can be reliably produced.

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Nadolski, M., Z. Konopka, M. Łągiewka, and A. Zyska. "The Influence of the Mould Filling Conditions on the Quality of Castings Made of EN AC-44000 Alloy." Archives of Foundry Engineering 14, no. 2 (June 1, 2014): 19–22. http://dx.doi.org/10.2478/afe-2014-0029.

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Abstract The work deals with the influence of change in the filling conditions of the ceramic moulds with plaster binder on the presence of gaseous porosity and the microstructure of the achieved test castings with graded wall thickness. Castings made of EN AC-44000 alloy, produced either by gravity casting, or by gravity casting with negative pressure generated around the mould (according to the Vacumetal technology), or by counter-gravity casting were compared. The results of examinations concerning the density of the produced castings indicate that no significant change in porosity was found. The increased size of silicon crystals was found for the increased wall thicknesses due to the slower cooling and solidification of castings.

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TOMITA, Taketoshi. "Recent Aluminum Alloy Casting Technology." Journal of the Japan Society for Technology of Plasticity 47, no. 543 (2006): 262–68. http://dx.doi.org/10.9773/sosei.47.262.

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Emes, Chris, and Richard J. Collins. "New Billet Mould Casting Technology." Materials Science Forum 630 (October 2009): 187–91. http://dx.doi.org/10.4028/www.scientific.net/msf.630.187.

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The aluminum billet casting industry is continually looking for reliable, simple and efficient ways to produce high quality, aluminum billet stock for the extrusion and forging industry. Current demands for billet quality requires that the billet have a very thin inverse segregation of less than 250 microns, uniform cell size of less than 30 microns depending on the alloy, average grain size of less than 130 microns, dendrite arm spacing of less than 50 microns and is crack free. The characteristics of the mould technology needed to achieve the required metallurgical quality economically are described in this paper.

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Bünck, Matthias, Todor Stoyanov, Jan Schievenbusch, Heiner Michels, and Alexander Gußfeld. "Titanium Aluminide Casting Technology Development." JOM 69, no. 12 (August 28, 2017): 2565–70. http://dx.doi.org/10.1007/s11837-017-2534-0.

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Rudnitsky, F. I., and L. P. Dolgiy. "Features of technology for manufacturing cast toolbills from rapid-cutting steel R6M5." Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY), no. 4 (December 16, 2020): 68–74. http://dx.doi.org/10.21122/1683-6065-2020-4-68-74.

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The article presents the results of computer simulation of the crystallization of castings from high-speed steel R6M5, intended for the manufacture of cutters and gear shaping tools in the conditions of OJSC “Minsk Gear Plant”. The use of modeling made it possible to optimize the gating system, reduce this volume of the profitable part by 30–35 % and increase the yield of suitable casting, which made it possible to reduce the consumption of expensive alloying elements introduced into the melt to compensate for burnout during melting and casting.

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Cheng, Le, Hong Xing Lu, Qiang Zhu, Xiang Kai Zhang, Ai Di Shen, and Peng Yang. "Evolution of Microstructure and Mechanical Properties of Semi-Solid Squeeze Cast A356.2 Aluminum Alloy during Heat Treatment." Solid State Phenomena 285 (January 2019): 139–45. http://dx.doi.org/10.4028/www.scientific.net/ssp.285.139.

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Semi-solid squeeze casting (SS-SC) is a new processing technology which combines semi-solid processing (SSP) and squeeze casting (SC). In this process, semi-solid slurry fills mold by using its rheological property and solidifies under high pressure. It has several advantages, such as stable filling, small heat impact to the mold, low cost, high density and excellent mechanical properties of castings, which receives more and more attention. The microstructure of castings provided by SS-SC is quite different from that of casting provided by conventional SC in as-cast condition, which leads to differences in the evolution of microstructure and mechanical properties in heat treatment process. In this study, A356.2 aluminum alloys castings were provided by both SS-SC and conventional SC respectively. The evolution of microstructure and mechanical properties of castings during heat treatment was investigated to obtain the best mechanical properties of semi-solid squeeze castings. Keywords:Microstructure, Mechanical properties, Heat treatment, A356 alloy, Semi-Solid Squeeze Casting

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Wans, Jochen, J. Bausch, J. Hecken, and J. Schlüter. "Near-Net-Shape Casting of Steel - The Belt Casting Technology." Materials Science Forum 638-642 (January 2010): 3634–39. http://dx.doi.org/10.4028/www.scientific.net/msf.638-642.3634.

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The production of value added products made of high-alloyed Mn-, Al-, Si-steel grades is coupled to the casting technology. Conventional casting technologies will not fulfill the requirements concerning interaction between steel and casting flux as well as guiding as cast material without stress. Mechanical engineers are invited for further developments in the field of near-net-shape casting technologies to meet above mentioned demands. The Belt Casting Technology seems to be the answer but has to document the potential for an industrial standard process. The main process characteristics of the casting machine are high casting speed, moving mould consisting of a conveyor belt and side dams, complete inertisation and horizontal material flow. The process is already common at the nonferrous metal industry. A labo-ratory caster for steel is located at Clausthal University of Technology.

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Pałyga, Ł., M. Stachowicz, and K. Granat. "Effect of parameters of high-pressure die casting on occurrence of casting nonconformities in sleeves of silumin alloy EN AB 47100." Archives of Metallurgy and Materials 62, no. 1 (March 1, 2017): 373–78. http://dx.doi.org/10.1515/amm-2017-0058.

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Abstract The paper presents a research on the effect of extreme - for the technology of the considered silumin EN AB 47100 - parameters of high-pressure die casting on occurrence of casting nonconformities. Considered was influence of the way of assembling the mould cooled-down to 140-160°C, non-standard for the selected casting, and pouring temperature in the range of 705 to 720°C (higher than the recommended) of non-refined alloy. The castings were prepared with use of a high-pressure casting machine made by Kirov with mould closing force of 2500 kN. Occurrence of nonconformities was evaluated on properly prepared specimens taken from the castings manufactured with various parameters of the injection piston and various multiplication pressures. The results were subjected to quantitative and qualitative analyses of casting nonconformities and distribution of major alloying elements. It was found that proper selection of working parameters of the casting machine, in spite of disadvantageous pouring conditions, makes it possible to reduce occurrence of some casting defects, like shrinkage cavities and porosity, to improve tightness of castings even when the alloy refining process is omitted.

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Xu, Yong Tao, Tian Yang Guan, Zhi Feng Zhang, Yue Long Bai, and Wei Min Mao. "Semi-Solid Rheological Squeeze Casting Process of ZL114A Aluminum Alloy Thin-Wall Complex Casting." Materials Science Forum 993 (May 2020): 248–53. http://dx.doi.org/10.4028/www.scientific.net/msf.993.248.

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High-strength aluminum alloy with large-scale and thin-walled complex castings have broad application prospects in aerospace, weapons, electronics, defense and military industries. However, due to the uneven thickness of the plate, the casting defects are inevitable by the ordinary casting method, and it is impossible to accurately control the shape and performance of the casting in the casting process. Previous studies have found that the semi-solid rheological extrusion casting technology with short process and near-end type can help solve this technical problem. Therefore, this paper studies the semi-solid rheological extrusion casting process of thin-walled complex casting of ZL114A aluminum alloy. The combination of numerical simulation and experimental research is used to simulate and optimize the filling and solidification process of thin-walled specimens. Based on this, a semi-solid rheological extrusion casting test was conducted. The result showed that, (1) The optimized model can well reflect the filling and solidification process under different rheological extrusion casting parameters, and obtain defect-free castings through process optimization. (2) The thin-walled parts of the thin plate casting produced by semi-solid rheology extrusion have excellent mechanical property and ductility.

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Huang, Yao, Yue Dong, and Yong Huang. "Shell Die-Casting and its Process Based on Numerical Simulation." Advanced Materials Research 233-235 (May 2011): 1167–70. http://dx.doi.org/10.4028/www.scientific.net/amr.233-235.1167.

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In this paper, the distribution and variation trend of temperature and velocity fields were obtained by numerical simulation of the casting process of shell die casting. According to the results of the numerical simulation, the die casting technology was optimized. The sound castings were produced. It was verified that shrinkage cavity and porosity could be reduced by increasing injected pressure and decreasing pouring and mould temperatures. The reliability of numerical simulation of die casting process was proved. In addition, the qualified products were obtained on the basis of the optimized die-casting parameters from the simulation results.

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Nadolski, M., Z. Konopka, M. Łągiewka, and A. Zyska. "The Influence of the Method of Mould Filling on the Quality of Castings Made of EN AC-44000 or EN AC-46200 Alloy." Archives of Foundry Engineering 14, no. 4 (December 1, 2014): 73–76. http://dx.doi.org/10.2478/afe-2014-0089.

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Abstract The performed examinations concerning the process of filling the plaster ceramic moulds with aluminium alloys allowed to assess the influence of various methods of introducing the metal into the mould cavity on the macro- and microstructure of the obtained experimental castings. The comparison was performed for castings with graded wall thickness made either of EN AC-44000 alloy or of EN AC-46000 alloy, produced either by gravity casting, or by gravity casting with negative pressure generated around the mould (according to the Vacumetal technology), or by counter-gravity casting. It was found that the silicon crystals grow in size with an increase in wall thickness due to the slower cooling and solidification of castings

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Tang, Hong Qun, Hong Yu Wei, Lu Shu Wu, and Shan Shan Hu. "Smelting Technology in Electric Furnace for Thick and Large Gray Iron with High Strength." Advanced Materials Research 189-193 (February 2011): 4003–7. http://dx.doi.org/10.4028/www.scientific.net/amr.189-193.4003.

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Aiming at large and thick automobile die casting as well as combining with production practice, the main factors which influence the strength of gray iron in electric furnace are investigated and the smelting technology of electric furnace for thick and large gray iron with high strength is proposed in this paper. The result shows that the tensile strength of attached test specimen or hardness of casting can meet the application requirements greatly. This smelting technology provides reference for large and thick castings smelting under similar conditions.

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Marukovich, E. I., A. M. Branovitskiy, A. A. Kruglov, V. A. Dement’ev, and N. P. Sadovskiy. "PRODUCTION OF ROTARY ENGINES’ PARTS FROM ALUMINUM ALLOYS USING LOST FOAM CASTING PROCESS." Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY), no. 1 (April 6, 2018): 16–21. http://dx.doi.org/10.21122/1683-6065-2018-1-16-21.

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The production technology of casting details for rotary engine from the aluminum alloy АК12М2 is developed. The bulk density of expanded polystyrene to ensure the best quality of the surface of castings has been experimentally established. The lost foam casting shop was organized in the experimental department of the Institute.

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Vanko, Branislav, Ladislav Stanček, Michal Čeretka, Eduard Sedláček, and Roman Moravčík. "Properties of EN AW-2024 Wrought Aluminum Alloy after Casting with Crystallization under Pressure." Scientific Proceedings Faculty of Mechanical Engineering 23, no. 1 (December 1, 2015): 58–65. http://dx.doi.org/10.1515/stu-2015-0009.

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Abstract Establishing of wrought aluminum alloys casting to manufacture is now a global trend, for example due to lower production costs compare to forging or due to the ability to produce parts with thinner sections and more complex shapes. The aim of using these alloys in the foundry industry is in particular the creation of castings with higher mechanical properties than achieve castings made of standard casting aluminum alloys. Most often are cast wrought aluminum alloys of the 2xxx, 6xxx and 7xxx series. In the experiment, an alloy EN AW-2024 has been cast by modified technology of casting with crystallization under pressure. They were measured basic mechanical properties of the castings in the as-cast state and after heat treatment.

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Volkov, D. A., A. D. Volkov, and A. V. Efimenko. "Investigation of the technological parameters of cored castings when in a lined coquille." Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY), no. 2 (July 9, 2021): 32–36. http://dx.doi.org/10.21122/1683-6065-2021-2-32-36.

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The article presents a number of experimental and research works on the development of the parameters of the casting technology for castings with internal cavities formed by a sand rod, by casting in a lined coquille (chill mould) with a vertical connector. The influence of gating systems with a central riser and side risers on the thickness of the casting wall shedding and on the mechanical characteristics of the cast iron alloy, including ligatures, is revealed.

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Yang, Da Chun. "Foundry Technology of the Pressure Board Steel Casting Based on Proportional Solidification Theory." Advanced Materials Research 314-316 (August 2011): 691–94. http://dx.doi.org/10.4028/www.scientific.net/amr.314-316.691.

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For plate steel castings, the foundry technology was designed according to the dynamic directional solidification of proportional solidification theory. Adopting chilling process for the thick and large plane, it may cause the casting basically even cooling. Using self-feeding shrinkage in solidification achieved the dynamic directional feeding of molten steel, and the casting was poured and congealing at the same time. The shrinkage of finally congealing part was fed by small riser. Adopting this foundry technology, the large plane downwards avoided appearing the defects such as sand buckle, slag, pinhole porosity, and pore, etc.; the process yield was greatly increased with this foundry technology, too.

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Baranova, T. F., I. V. Dyakonova, N. I. Shunkina, S. I. Polyansky, Yu R. Nurtdinov, and M. A. Gorbanenko. "Testing of electrocorundum powders of the company «Technoceramics» in the manufacture of ceramic molds." NOVYE OGNEUPORY (NEW REFRACTORIES), no. 7 (October 29, 2019): 12–18. http://dx.doi.org/10.17073/1683-4518-2019-7-12-18.

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The technology of manufacturing ceramic molds from electrocorundum powders of the company «Technoceramics» for the casting of parts from heatresistant nickel alloys was investigated and developed. The powders were used instead of the commercially used electrocorundum powders of JSC Rusal. Molds for metal casting of various sizes and configurations of the internal cavity for casting cooled and uncooled blades of heat-resistant alloys were manufactured and tested. Technical properties of casting molds are preserved. The characteristics of castings of equiaxial and directional structure are provided in accordance with the technical requirements of the drawing and technical conditions. Ill. 5. Ref. 2. Tab. 6.

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Prikhod’ko, O. G., V. B. Deev, E. S. Prusov, and A. I. Kutsenko. "Influence of thermophysical characteristics of alloy and mold material on castings solidification rate." Izvestiya. Ferrous Metallurgy 63, no. 5 (July 1, 2020): 327–34. http://dx.doi.org/10.17073/0368-0797-2020-5-327-334.

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Obtaining castings of given quality is the main task of foundry production. One of the stages of casting technology is solidification of melt in the mold. When studying the process of castings solidification, it is necessary to fully take into account all the features of heat transfer between casting and mold. Influence of various thermophysical parameters of alloy and mold material on casting formation is considered. In the analysis, original mathematical models were used to calculate the coefficient and time of complete solidification of castings in sand-clay and metal forms. These models take into account geometric parameters of casting, main thermophysical parameters of casting metal and mold material, heat transfer conditions at crystallization front, on casting-mold boundary and on the mold surface. Analysis of dependence of time and rate of castings solidification on thermophysical parameters (heat capacity, density, heat conductivity of casting material and mold, specific heat of metal crystallization) was carried out. Storage capacity and process of heat storage are quite fully characterized by the value of heat storage coefficient. This coefficient practically determines the rate of heat loss by the casting which plays a decisive role in its properties forming. Therefore, this parameter is selected for a comprehensive analysis of thermal processes occurring in casting and mold. The influence of thickness and thermal conductivity of chill paint layer on solidification of castings in metal molds is considered. The basic calculation formulas and initial data are presented. Calculations were carried out for castings of the following types: endless plate, endless cylinder, ball. The results of simulation of solidification process parameters are presented in graphic form. Using various alloys as an example, it has been shown by calculation that when changing composition and properties of mold material, it is possible to change time and speed of alloys solidification in a wide range. In this case, processes of forming the structure and properties of castings are controlled.

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Yu, Huan, Jia Hui Wang, Bo Wen Xiong, Qing Song Yan, Zhi Feng Xu, and Guo Feng Liu. "Study on the Grade-Controlled Filling of Vacuum Counter-Pressure Casting Thin Wall Aluminum Alloy." Advanced Materials Research 337 (September 2011): 522–25. http://dx.doi.org/10.4028/www.scientific.net/amr.337.522.

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The grade-controlled filling behavior of vacuum counter-pressure casting thin wall aluminum alloy was studied by numerical simulation and experimental investigation. According to the analysis of filling behavior under fixed pressure and the casting structure, the technology of the grade-controlled filling of vacuum counter-pressure casting thin wall aluminum alloy was suggested. The result shows that the filling velocity was controlled on grade, resulting in the smoothly and sequential filling behavior, and the decreasing of defects in castings.

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Terashima, Kazuhiko, and Shunji Moromugi. "Special Issue on Casting Technology Automation and Control." International Journal of Automation Technology 2, no. 4 (July 5, 2008): 227–28. http://dx.doi.org/10.20965/ijat.2008.p0227.

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Kazuhiko Terashima, p. 227 Simple, low-cost casting technology is essential to transforming materials into products that are used for important components in the automobile, precision machining, and fabrication fields. The casting industry is currently becoming involved in global manufacturing competition as areas such as press, forging, spray-coating, and machining becoming increasingly active. Against this background, the casting society is striving to achieve high quality, lightening, high production, and low cost. This special issue was planned in discussions with Dr. S. Moromugi and provides insight on high-technology furnace, molding, sand process, pouring, inspection of iron casting using green sand, together with innovative casting methods such as sand press casting, die casting, full molding, and IT technology for managing of cast products. This special issue’s advanced papers were selected as representative of individual fields that should prove interesting, stimulating, and of great practical use to both general readers and specialists alike. We thank the authors for their kind attention to the many interesting papers contributed to this issue. Shunji Moromugi, p. 228 Casting, one of the most basic and oldest manufacturing processes, dates back over five centuries. Casting technologies developed over a long period and involve a wide varieties of methods and techniques for improving product quality. Product efficiency has been dramatically improved thanks to advances in casting automation. Even so, many hands are still needed in some casting production because experienced, skilled, and knowledgeable crafts persons are the key to success in yet unautomated casting production processes. Many fields still await the development of automation in casting. With progress in globalization, economy concerns with automation in basic metal processing are increasing rapidly, especially in newly industrialized nations. This special issue presents many valuable papers and development reports by researchers and engineers active on the front lines of casting automation development. This special issue will serve as a useful reference providing much practical information and many new insights into automation technology for casting engineers worldwide. We thank guest editor Professor Kazuhiko Terashima for his invaluable assistance throughout the editing process. This special issue would not have been possible without him. We also thank the authors and editors for their contributions to this issue.

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Journal articles on the topic 'Casting technology'

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