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Статті в журналах з теми "Equipment alloys"

Автор: Grafiati

Опубліковано: 30 травня 2022

Оновлено: 31 травня 2022

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1

Ospennikova, O. G., V. N. Podjyachev, and Yu V. Stolyankov. "Refractory alloys for innovative equipment." Proceedings of VIAM, no. 10 (October 2016): 5. http://dx.doi.org/10.18577/2307-6046-2016-0-10-5-5.

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2

Rudenok, V. A., O. M. Kanunnikova, G. N. Aristova, and O. S. Tikhonova. "The design and properties of galvanic anticorrosive coatings for important precision parts of farming equipment." IOP Conference Series: Earth and Environmental Science 949, no. 1 (January 1, 2022): 012113. http://dx.doi.org/10.1088/1755-1315/949/1/012113.

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Abstract The paper explores the possibility of using a number of nickel alloys in multilayer coatings to decrease nickel consumption and preserve the functional effect of the coating. The following is proved by the graphical calculation technique using experimental data on the galvanic properties of the multilayer coating parts. Nickel-iron, nickel-phosphorus and nickel-tin alloy can be applied as a lower coating layer rather than semi-shiny, shiny or composite nickel. It is advisable to use a nickel-iron alloy as the middle (second) layer, and the concentration of iron depends on the composition of the first and third layers. If a nickel-iron alloy is applied as the material of the first layer, then the second layer may be semi-shiny (Ns-sh) or shiny (Nsh) nickel. The substitution of nickel layers for nickel alloys allows to considerably (about 10%) decrease the cost of a multilayer coating, while the protective properties are remaining the same. The application of the same nickel-containing alloys as single-layer anticorrosive coatings shows a lower level of protective properties.

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3

Лосев, Е., E. Losev, В. Попов, V. Popov, Д. Лобанов, D. Lobanov, П. Архипов, P. Arkhipov, А. Янюшкин, and A. Yanyushkin. "Surface quality of tungstenfree hard alloys after diamond machining." Science intensive technologies in mechanical engineering 1, no. 1 (January 31, 2016): 20–24. http://dx.doi.org/10.12737/17318.

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The quality parameters of TN-20 hard alloy after the diamond machining are determined. The technology of combined electro-diamond grinding, which allows resolving the problems of equipment modernization and definition of optimal machining conditions of tungstenfree hard alloys, is developed. The methods of metallographic and spectral analysis, which determined the reasons of low quality of surfaces of tungstenfree hard alloys after abrasive machining, are used. Based on the analysis of the research results, the combined electro-diamond grinding technology for improving the machining performance of parts from tungstenfree hard alloys, is recommended.

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4

Chemical Center, ULVAC TECHNO, Ltd. "Anodizing of Aluminum Alloys for Vacuum Equipment." Journal of the Vacuum Society of Japan 52, no. 12 (2009): 645–48. http://dx.doi.org/10.3131/jvsj2.52.645.

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5

Makushina, M. A., A. S. Kochetkov, and N. A. Nochovnaya. "CAST TITANIUM ALLOYS FOR AVIATION EQUIPMENT (review)." Proceedings of VIAM, no. 7 (2021): 39–47. http://dx.doi.org/10.18577/2307-6046-2021-0-7-39-47.

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This article discusses cast titanium alloys used in the construction of aircraft products and engines. Descriptions of the casting properties of titanium alloys are presented. The requirements for castings made of titanium alloys specified in the industry regulatory and technical documentation are set out. The main characteristics of their properties, advantages and disadvantages are considered. Some methods of increasing the parameters of mechanical properties are described. Conclusions are drawn about the current situation in the field of aviation foundry titanium alloys and products made from them.

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6

Nagy, András, and Imre Némedi. "Development of Magnetic Material Testing Equipment." Acta Materialia Transylvanica 3, no. 1 (April 1, 2020): 33–37. http://dx.doi.org/10.33924/amt-2020-01-06.

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AbstractThis paper deals with the development of equipment that can accurately determine the magnetic properties of small volume thin plate samples. The alloys to be tested are sheets of amorphous structure, such as Finemet alloy, which has excellent high frequency magnetic properties, making it a good candidate for the construction of high efficiency electric motors. This article discusses the components and operation of the equipment under development, whilst giving a brief overview of the efficiency classification of electric motors and the importance of the emerging efficiency class.

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7

Maslov, Yu N. "Magnetic measuring equipment for electrical steels and alloys." Measurement Techniques 30, no. 8 (August 1987): 803–6. http://dx.doi.org/10.1007/bf00865672.

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8

Petrov, M. A., N. V. Kosachev, P. A. Petrov, A. A. Shejpak, and Ju L. Bast. "Design of prototype devices for producing metal microspheres and shells." Izvestiya MGTU MAMI 7, no. 2-2 (March 20, 2013): 233–37. http://dx.doi.org/10.17816/2074-0530-68257.

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Rapid prototyping technology implemented quite actively for all types and types of production. Its application reduces the influence of human factor on quality of a product but it also require the operator that knows this field and have some skills of handling machine. These technologies are also used to create models and visual functional prototypes, which can recreate the developed process and test the individual steps to prove its efficiency. The laboratory equipment that was made in Freiberg University of Mining and Technology allows to produce metal microspheres and shell (0,5 – 3 mm). Modernization of this equipment was proposed by creating a prototype of a mechatronic system that would show the requirements to the device and its capabilities. Creation of a device prototype is a transitional point from a laboratory layout to production equipment that works with high performance and repeatability. The device can operate under vacuum and inert gas that allows to work not only with model materials such as tin, zinc, alloy rose eutectic alloys based on bismuth and tin but also with structural materials, such as aluminum, magnesium and their alloys. Individual parts of the functional prototype was created by rapid prototyping technology (MJM, FDM and milling) of the polymers.

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9

HAO, YUAN, TIJUN CHEN, YING MA, YUANDONG LI, FENGYUN YAN, and XIAOFENG HUANG. "SOME KEY ISSUES AND ACCESSES TO THE APPLICATION OF MAGNESIUM ALLOYS." International Journal of Modern Physics B 24, no. 15n16 (June 30, 2010): 2237–42. http://dx.doi.org/10.1142/s0217979210064721.

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The status of Mg alloy application, and then some key issues limiting their applications and the corresponding accesses were briefly discussed. It was supposed that development of new alloys with high performance and low cost, investigating advanced forming technology, and development of credible and effective surface modification technologies and related equipment were the urgent tasks in present. Correspondingly, three aspects of researches were carried out. (1) A new alloy with high strength and elongation, but low RE and Zn contents, named ZW21, was invented. (2) Semisolid ingots of AZ91D, AM60 and ZW21 alloys available for thixoforming were prepared. Thixoforming increased the ultimate tensile strength of AZ91D alloy by 20% compared with permanent mould casting. (3) A new kind of micro arc oxidation equipment with a capacity of treating 6m2 surface was developed and has been used to treating motorcycle hub of magnesium alloy.

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10

Kim, Pyung Su, So Young Choi, Young Sik Kim, and Jong Do Kim. "A Study on the Weldability of INCOLOY 825 Alloys and STS316L Alloys." Advanced Materials Research 1110 (June 2015): 118–24. http://dx.doi.org/10.4028/www.scientific.net/amr.1110.118.

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Bellows are widely used as parts in industrial machinery such as ships, valves, automotive, semiconductor equipment, flow and pressure sensors, and even in aircraft. Due to the recent depletion of conventional fossil fuels, natural liquified petroleum is increasingly demanded as an alternative energy, which in turn increases the demand for bellows on LNG ships. As the material used the bellows of LNG ships, the STS316L and INCOLOY 825 alloy, resistant to low-temperature embrittlement and corrosion, are used. STS316L is low-carbon stainless steel with a carbon content of less than 0.03%, preventing intergranular corrosion by welding work and maintaining its toughness and strength at a low temperature. In addition, Ni-Fe-Cr-based INCOLOY 825 alloy, containing Mo, Cu and Ti, is an alloy material resistant to general local corrosion in various atmospheres. INCOLOY 825 alloy is widely used for the creation of chemical processing equipment and in pollution-treatment facilities, oil and gas reduction equipment, acid manufacturing plants, pickling plants, nuclear fuel reprocessing and radioactive waste treatment facilities as well as in the bellows of LNG ships. Furthermore this material maintains good mechanical properties across a wide range of temperatures from ultra-low temperatures up to temperature approaching 500 °C. In this study, to assess its quality as a LNG ship bellows material, the STS316L and INCOLOY 825 alloy, used at an ultra-low temperature, the optimal welding conditions were established and its formability was analyzed by conducting an Erichsen test.

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11

Schastlivaya, I. A., V. P. Leonov, I. V. Tretyakov та A. Yu Askinazi. "Influence of the composition of α-titanium alloys on thermal conductivity". Voprosy Materialovedeniya, № 4(104) (12 лютого 2021): 79–86. http://dx.doi.org/10.22349/1994-6716-2020-104-4-79-86.

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Among titanium alloys, modern α- and pseudo-α-alloys occupy a special place due to the unique combination of their mechanical properties, corrosion resistance, low density and high specific strength, which determines their effectiveness in various industries. Analysis of structural materials used for heat exchange equipment of nuclear power plants showed that the increase in the efficiency and compactness of tube systems made of a-titanium alloys is constrained by their thermal conductivity characteristic, which does not exceed 89 W/(m·K) at a temperature of 20°C. An exception is the VT1-0 grade alloy, the scope of which is limited to a maximum operating temperature of no more than 250°C. The paper considers the results of studies of a new titanium alloy of the Ti-Zr-Al-O composition with increased thermal conductivity for pipe systems of power equipment.

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12

Aremo, B., and M. O. Adeoye. "A low-cost vacuum casting equipment for aluminium alloys." Russian Journal of Non-Ferrous Metals 51, no. 2 (April 2010): 124–30. http://dx.doi.org/10.3103/s1067821210020094.

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13

Grossmann, G., and M. Rockel. "High-alloy corrosion-resisting alloys in equipment for combustion of household and industrial waste." Chemical and Petroleum Engineering 30, no. 5 (May 1994): 233–36. http://dx.doi.org/10.1007/bf01150945.

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14

Wendt, Joachim, Boris Bronfin, Lennart Stutz, Gerrit Kurz, Sabrina Schmitt, Menachem Bamberger, and Dietmar Letzig. "Twin Roll Casting and Rolling of New Mg-Wrought Alloys for Body Protective Safety Equipment." Materials Science Forum 783-786 (May 2014): 534–36. http://dx.doi.org/10.4028/www.scientific.net/msf.783-786.534.

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Currently magnesium alloys are used for different applications in the transportation industry where cast magnesium alloys dominate the market. Although cast alloys predominate over wrought products such as extrusions, forgings, sheet and plate, the latter are also being used in a variety of different applications. Recently, a growing interest in the automotive industry in looking at potential applications for magnesium turned back towards wrought alloys. Typically, applications of magnesium sheets are sought in automotive or aeronautics industry. However, the spectrum of potential applications can be significantly expanded. For example, body protection systems for civil services like police, custom officers and prison personnel currently include anatomically shaped aluminium alloy sheets. Replacement of aluminium alloys by magnesium to result in substantial weight savings up to 30%.

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15

Utochkin, Yu I., A. E. Semin, and N. A. Smirnov. "Metallurgical equipment market in Russia." Russian Metallurgy (Metally) 2007, no. 7 (December 2007): 580–84. http://dx.doi.org/10.1134/s0036029507070087.

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16

Drotlew, A., M. Garbiak, and B. Piekarski. "Cast Steels for Creep-Resistant Parts Used in Heat Treatment Plants." Archives of Foundry Engineering 12, no. 4 (December 1, 2012): 31–38. http://dx.doi.org/10.2478/v10266-012-0103-0.

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Abstract Creep-resistant parts of heat treatment furnaces are in most cases made from high-alloyed chromium-nickel and nickel-chromium iron alloys, both cast and wrought. This paper presents the types of casting alloys used for this particular purpose, since the majority of furnace components are made by the casting process. Standards were cited which give symbols of alloy grades used in technical specifications by the domestic industry. It has been indicated that castings made currently are based on a wider spectrum of the creep-resistant alloy grades than the number of alloys covered by the standards. Alloy grades recommended by the technical literature for individual parts of the furnace equipment were given. The recommendations reflect both the type of the technological process used and the technical tasks performed by individual parts of the furnace equipment. Comments were also made on the role of individual alloying elements in shaping the performance properties of castings.

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17

Rodriguez, Alvaro A., Chelsea N. Monty, Christopher M. Miller, Hongbo Cong, and Evan K. Wujcik. "Laboratory techniques for evaluating the effectiveness of salt neutralizers for the corrosion prevention of winter maintenance equipment." Anti-Corrosion Methods and Materials 63, no. 6 (November 7, 2016): 499–507. http://dx.doi.org/10.1108/acmm-03-2015-1516.

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Purpose The purpose of this study is to develop laboratory techniques to evaluate the inhibition efficiency of salt neutralizer (SN) solutions in the corrosion protection of metal alloys associated with winter maintenance equipment. Design/methodology/approach The corrosion resistance of alloys A36, B36 and B152 treated with SNs was evaluated by accelerated corrosion testing (ASTM B117) and electrochemical polarization curves. Characterization of inhibition solutions was performed by contact angle measurements, scanning electron microscopy, ultraviolet-visible spectroscopy and Fourier transform infrared spectroscopy. Findings Salt neutralizer systems act as mixed inhibitors in acidic media by changing the corrosion resistance ability of metal alloys because of the adsorption of surfactant molecules through their hydrophilic heads. The correlation of the corrosion rate of metal alloys and the inhibitor efficiency showed the influence of the SN type, its concentration, its effective adsorption constant and its contact angle on the alloy surface. Salt neutralizers with higher manufacturer’s recommended wash concentrations (MRWC) to critical wash concentration ratio, lower contact angle on the alloy surface and higher Keff were more successful at preventing corrosion on the alloys tested. Originality/value The results of this work provide, for the first time, both quantitative and qualitative information of the properties of washing techniques in the use of effective cleaning strategies for protecting winter maintenance equipment from corrosion. Other state departments of transportation facing similar weather conditions will be benefited by identifying measures and techniques to increase the corrosion resistance of their equipment assets.

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18

Tian, Tie, Xing Zi Mao, and Lin Mi. "Present Status of Damping Test Techniques for Magnesium Alloys." Applied Mechanics and Materials 472 (January 2014): 85–90. http://dx.doi.org/10.4028/www.scientific.net/amm.472.85.

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The present situation of damping capacity for magnesium alloys test techniques and its equipment were reviewed. Because there were many types of test equipment, So it pointed out the suitability of all testing equipment and schemes for damping testing of magnesium alloys. And based on the research results of dislocation damping mechanism of magnesium alloys. The author holds that test scheme for torsional deformation of torsion pendulum and test scheme for bending and shearing deformation of dynamic thermal mechanical analyzer meet high-precision test requirements for non-linear damping capacity of magnesium alloys. The study make great value for testing damping of magnesium alloys and reflecting their damping advantage.

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19

Laptev, A. B., S. A. ,. Naprienko, R. ZH Akhiyarov, and A. V. Golubev. "Heavy Loaded Parts of Petrochemical Equipment Destruction Cause Investigation." WSEAS TRANSACTIONS ON APPLIED AND THEORETICAL MECHANICS 17 (January 5, 2022): 1–7. http://dx.doi.org/10.37394/232011.2022.17.1.

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The problem of using specialized passivating metals and alloys lies in a rather narrow range of the protecting film performance. With a slight change in operating conditions, the film is destroyed and an avalanche-like process of local corrosion begins at the place of film breakdown. A sequence has been developed for determining parts destruction causes, including a sequential analysis of operating conditions; nature of the part destruction; corrosion products composition; phase inversion in the alloy during overheating or mechanical stress in the part.

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20

Butorin, P. B., Yu B. Danylov, and V. S. Bobrin. "Selection of Corrosion Resistant Construction Materials for Caustic Soda Production Equipment." Oil and Gas Technologies 135, no. 4 (2021): 24–31. http://dx.doi.org/10.32935/1815-2600-2021-135-4-24-31.

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The article considers the corrosion resistance of domestic and foreign materials, both the base metal and welded joints in the media of concentration of electrolytic alkalis in the range of NaOH concentrations from 12% to 99.5% and temperatures from 115 to 395°С. For testing, specimens of 2080 mm in size with transverse welds with two drilled holes were made from the material under study. polished and assembled into cassettes using nickel alloy rods. For the first time, comparative data on the corrosion state of structural materials during evaporation of electrolytic slits obtained by diaphragm electrolysis and electrolysis using a mercury cathode were obtained. The results of corrosion studies are quite well corrected with the experience of operating nickel pipes at the first stage of alkali concentration. The electrochemical heterogeneity of welded joints of alloys 33 and 201 was evaluated. The conducted studies of the corrosion resistance of alloys 201 and 33 under conditions of evaporation of NaOH obtained by mercury electrolysis confirmed the high corrosion resistance of nickel alloy 201 at the main stages of alkali concentration. The research results can be used as recommendations for the development of structural materials.

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21

Heydartaemeh, Mohammadreza, Mohammad Karamoozian, and Herman Potgieter. "Application of Nano High-Entropy Alloys to Reduce Energy Consumption and Wear of Copper Oxide and High-Grade Iron Ores in Heavy Mining Industries—A Case Study." Minerals 10, no. 1 (December 23, 2019): 16. http://dx.doi.org/10.3390/min10010016.

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Problems relating to the abrasion of equipment is one of the most important issues in mining and associated industries. Hardening is a method of protecting metal equipment, metal tools, or important components against erosion, corrosion, and abrasion. This can be achieved by welding a thin layer of abrasion-resistant metal onto the surface of the work piece. The useful life of a piece of equipment or parts can be significantly increased by applying abrasion-resistant coatings, thereby reducing repair or replacement costs associated with damaged parts. This process is inexpensive in the production of parts and is often economically justifiable. This study focuses on measuring the abrasion resistance of a nano high-entropy alloy against copper oxide and high-grade iron ores. When a base alloy was coated with the nano high-entropy alloy, the abrasion indexes of iron and copper ores decreased from 0.0001647 kg to 0.0000908 kg and from 0.0001472 kg to 0.0000803 kg, respectively. The standard deviation, repeatability, and reproducibility were calculated for the alloy steel blade covered with nano high entropy alloy (N-HEA), producing values of 0.00016, 0.00047, and 0.00040, respectively, while a standard alloy steel blade exhibited values of 0.0003, 0.00047, and 0.00042, respectively. High-entropy alloys and high-entropy nano-alloys have not been used as practical coatings in the mineral industry in any form to date. Utilizing high-entropy nano-alloys in this industry would introduce innovative alternatives for customers, thereby increasing competitive advantages and providing international markets and customers = with the most efficient choices of operational materials.

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22

Wakisaka, Y., M. Mure, T. Kabutomori, H. Takeda, S. Shimizu, S. Ino, and T. Ifukube. "Application of hydrogen absorbing alloys to medical and rehabilitation equipment." IEEE Transactions on Rehabilitation Engineering 5, no. 2 (June 1997): 148–57. http://dx.doi.org/10.1109/86.593282.

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23

Navrotskii, A. "Blacksmithing equipment." Metallurgist 35, no. 3 (March 1991): 56–57. http://dx.doi.org/10.1007/bf00759901.

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24

Gaitov, B. Kh, and Ya M. Kashin. "Multiphase welding equipment." Welding International 21, no. 7 (July 2007): 529–33. http://dx.doi.org/10.1080/09507110701510378.

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25

Oryshchenko, A. S., V. P. Leonov, and V. I. Mikhaylov. "Titanium alloys for deep marine engineering." Voprosy Materialovedeniya, no. 3(107) (December 4, 2021): 238–46. http://dx.doi.org/10.22349/1994-6716-2021-107-3-238-246.

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The results of the work of the NRC “Kurchatov Institute” – CRISM “Prometey” on the creation of titanium alloys for deep-sea marine equipment, vehicles and submersibles are presented. The paper considers development of titanium alloys with a yield strength of more than 1000 MPa.

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26

Sasaki, Toshihiko, Toshiyuki Miyazaki, Hamiru Ito, Takashi Furukawa, and Tsuyoshi Mihara. "X-Ray Residual Stress Analysis of Nickel Base Alloys." Advanced Materials Research 922 (May 2014): 274–79. http://dx.doi.org/10.4028/www.scientific.net/amr.922.274.

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Nickel based alloys are widely used in steam generator tubes for nuclear power plants. 1-D X-ray stress measurements have been used for these alloys. But 1-D method requires large equipment and it is practically impossible to measure stress in power plants. In order to overcome this problem, we adopted 2-D X-ray method which requires significantly smaller equipment. In this paper we report preliminary results of 2-D X-ray stress measurements of nickel based alloys.

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27

MORI, Miki. "Electric Equipment." JOURNAL OF THE JAPAN WELDING SOCIETY 79, no. 5 (2010): 490–91. http://dx.doi.org/10.2207/jjws.79.490.

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28

Liu, Zheng, Li Liu, Si Bo Zhang, Zhi Wang, Ping Li Mao, and Yue Wang. "Investigations on Hot Tearing Susceptibility and its Mechanism of Mg-Zn-Y Alloys." Materials Science Forum 879 (November 2016): 1164–69. http://dx.doi.org/10.4028/www.scientific.net/msf.879.1164.

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Hot tearing sensitivity of MgZn2.5YxZr0.5(x=0.5,1,2,4,6) alloys were predicted by using thermodynamic calculations based on Clyne-Davies’ model, and verified experimentally by using a "T"-type hot tearing permanent-mold equipment. The hot tearing mechanism with different Y content of MgZn2.5YxZr0.5 alloys was investigated. The results demonstrated that the predicted values are consistent with that of measured values. The hot tearing susceptibility of the alloys from high to low are: MgZn2.5Y2Zr0.5 > MgZn2.5Y0.5Zr0.5 > MgZn2.5Y4Zr0.5 > MgZn2.5Y1Zr0.5 > MgZn2.5Y6Zr0.5. Among the studied alloys, the hot tearing sensitive of the alloys of MgZn2.5Y1Zr0.5 and MgZn2.5Y6Zr0.5 is less than that of the commercial alloy AZ91.

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29

Haga, Toshio. "Casting of Clad Strip by a Twin Roll Caster." Materials Science Forum 794-796 (June 2014): 772–77. http://dx.doi.org/10.4028/www.scientific.net/msf.794-796.772.

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Clad strip consisting of 5182 aluminum alloy and other aluminum alloys could be cast using a twin roll caster equipped with a scraper. This twin roll caster could carry out the strip casting and the bonding of the strips. The equipment, that was developed to prevent the contact between the bonding surface of the strip and oxidizing environment, was adopted. The developed equipment was a scraper. The 5182 strip could be bonded to other aluminum alloy strips by the effect of the scraper. Aluminum alloys for casting has poor formability, especially, bending ability is poor. The clad strip consisting of A356 casting aluminum alloy and 3003 wrought aluminum alloy was cast. 180 degree bending test was carried out on this clad strip. In the condition that the 3003 strip was outer side and A356 strip was inner side, the crack did not occur at the outer 3003 strip. In the deep drawing test or the clad strip, LDR (Limiting Drawing Ratio) was 1.8. These results mean that the casting aluminum alloy has ability to be used for the sheet forming, if the casting aluminum alloy is cladded with the wrought aluminum alloy.

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30

Tatsuoka, Teruhisa. "Equipment Management Doctor." Zairyo-to-Kankyo 67, no. 8 (August 15, 2018): 309–10. http://dx.doi.org/10.3323/jcorr.67.309.

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31

Fujikawa, Hisao. "Corrosion Behaviour of Equipment in High Temperatures and Corrosion Resistant Alloys." Diffusion Foundations 9 (October 2016): 111–27. http://dx.doi.org/10.4028/www.scientific.net/df.9.111.

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Among the high temperature damages, this paper was discussed on the cases in which the materials were damaged mainly by the effect of environmental factors. That is, high temperature oxidation, steam oxidation, molten salt corrosion, high temperature particle erosion and corrosion, high temperature sulfurization, carburizing, metal dusting, nitriding, high temperature chloride corrosion and so on were introduced using my research data. Finally, anticipation to future research of high temperature corrosion was maintained.

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32

Grigoletto, Eliane Maria, and Araí Augusta Bernardez Pécora. "Lead environmental issues and new solder alloys in electro-electronics equipment." Labor e Engenho 7, no. 4 (December 1, 2013): 68–74. http://dx.doi.org/10.20396/lobore.v7i4.169.

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The use of Surface Mounted Technology (SMT) and the miniaturization of the electronics equipment are demanding new lead-free materials in the soldering process, due to its high toxicity to human being and environmental concerns. Global competitiveness has been driving industries to technological development as challenges to the manufactures and there is an effort to use alternative materials for the soldering electronic components to find an environment-friendly process. This paper presents a literature review involving soldering processes and describes the lead toxicity from related residue. The main solder alloy that is nowadays used to substitute tin-lead and European Directives are also presented.

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33

Hamer, Shaun. "The Supply of Casthouse Equipment and Empowerment of Knowledge to Cast Aerospace Alloys the Almex Way." Materials Science Forum 630 (October 2009): 205–11. http://dx.doi.org/10.4028/www.scientific.net/msf.630.205.

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For well over a decade, Almex USA Inc. has been supplying hard alloy casting technology to the aluminum industry. Today, customers on five continents produce 2000 and 7000 series aluminum billets using this technology in sizes ranging from 75mm through to 1080mm in diameter. In order to produce such a range of sizes in hard to cast alloys and to aerospace standards, Almex has imparted complete casthouse process understanding and know-how, along with equipment supply to its customers. This paper provides an overview of Almex’s hard alloy casthouse technology and describes some of the critical parameters which must be controlled throughout the process route in order to produce defect free alloys for forging, extrusion and flat rolled applications. Explanation is also made of the microstructural requirements of the as cast product and how these influence the final product; along with the range of quality control solutions supplied by Almex to ensure these requirements are met on a continuous and repeatable basis by Almex’s technology users.

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Utyashev, Farid, Radik Mulyukov, Rafael Sukhorukov, and Vener Valitov. "New Technologies Development and Equipment for Local Shape-Forming of the Complicated Parts Made of Heat-Resistant Alloys under Superplastic Deformation Conditions." Materials Science Forum 838-839 (January 2016): 615–20. http://dx.doi.org/10.4028/www.scientific.net/msf.838-839.615.

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The results of development of new resource-saving technologies of local shape-forming under superplastic deformation conditions (SP) by means of roll-forming and rotary swaging are presented. These technologies are efficient for fabrication of discs, shells, rings up to 800 mm in diameter, as well as hollow shafts made of heat-resistant nickel-, titanium-and iron-based alloys that are used in aircraft engines and ground power installations. In particular, to implement innovative technologies a universal SRZhD-800 roll-forming mill has been developed for discs roll-forming made of heat-resistant alloys under SP. An efficiency of using of semi-finished products with prepared ultrafine grained (UFG) structure for generating precise complex geometry profile parts both homogeneous and regulated structure that changing in the radial direction of the disc and for obtaining high mechanical properties that are optimized taking operational conditions into account is proved. The technological process of rotary swaging under SP conditions has been developed for fabrication parts made of high alloy heat-resistant alloys using demountable mandrels. This method allows to obtain precise complex geometry profile parts such as disc with a thin cone flange which is characterized by homogeneous structure and high mechanical properties.

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35

Perekatov, S. V. "Organizing equipment repairs." Metallurgist 43, no. 10 (October 1999): 432. http://dx.doi.org/10.1007/bf02463634.

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Gerashchenkov, D. A., T. I. Bobkova, A. F. Vasiliev, P. A. Kuznetsov, E. A. Samodelkin, and B. V. Farmakovsky. "Functional protective coatings of nickel-based alloys." Voprosy Materialovedeniya, no. 1(93) (January 6, 2019): 110–14. http://dx.doi.org/10.22349/1994-6716-2018-93-1-110-114.

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Анотація:

A composition of a precision alloy based on the Ni–Cr–Mo system for wear and corrosion-resistant coatings by supersonic cold gas dynamic spraying has been developed. The optimum coatings composition provides high level of operational properties; its application is very promising for protection of structural and functional elements of marine equipment from aggressive environmental influence.

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Goman, V. V., and S. A. Fedoreev. "Plating Technology for Contact Joint Performance Improvement in Electrical Equipment." Materials Science Forum 870 (September 2016): 271–75. http://dx.doi.org/10.4028/www.scientific.net/msf.870.271.

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Анотація:

The paper analyzes a technology allowing the improvement of such performance characteristics of contact joints as reliability and operating economy, with demountable contact joints taken as an example. The performance characteristics are improved through applying protective metal coatings based on low-melting alloys on the contact members working surfaces. The paper describes the process of alloys selection as well as the development in the technology of the material application onto the contact members.

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38

Anikeev, V. N., and M. Yu Dokukin. "Electric Arc Vacuum Technologies and the Related Equipment." Russian Metallurgy (Metally) 2019, no. 6 (June 2019): 576–80. http://dx.doi.org/10.1134/s0036029519060053.

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39

Melcioiu, Georgiana, Viorel Aurel Şerban, Mark Ashworth, Cosmin Codrean, Marin Liţă, and Geoffrey D. Wilcox. "An Evaluation of Sn-Cu-Ga and Sn-Cu-Ag Solder Alloys for Applications within the Electronics Industry." Solid State Phenomena 216 (August 2014): 91–96. http://dx.doi.org/10.4028/www.scientific.net/ssp.216.91.

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Анотація:

Components soldered with Sn-based alloys are susceptible to the growth of whiskers. Tin whiskers have been proven to be responsible for equipment failures in a wide range of industries. In order to reduce defects in electronic components a new solder alloy is proposed based on the Sn-Cu alloys. The Sn-Cu-Ga alloy utilised in this study was fabricated as a ribbons using melt-spinning method. These ribbons were then soldered onto electroplated tin layers. Preliminary characterization of the solder alloy is presented in this paper, including scanning electron microscopy, EDX mapping and X-ray diffraction. Key words: tin whiskers, PCB, printed circuit boards, melt spinning, solder, ribbons

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40

Xie, Wei Dong, Xiao Dong Peng, Qun Yi Wei, Hua Nie, and Shou Cheng Wang. "Preparation of Mg-Sr Alloys Using Vacuum Reduction: A Thermodynamics Approach." Materials Science Forum 546-549 (May 2007): 463–66. http://dx.doi.org/10.4028/www.scientific.net/msf.546-549.463.

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At the present Mg-Sr alloy is usually produced by alloy mixing process or melt-leaching-reduction process which has low productivity. A new process has been developed termed “Preparation Mg-Sr alloys using vacuum thermal reduction”. The principle and procedure of the new process were discussed in this paper. The reduction thermodynamics was analyzed, including establishing the oxygen potential diagram of Sr, Mg, Si and Al, determination of main reactions, and evaluation of Gibbs free energy in vacuum. The results showed that Mg-Sr alloys can be obtained by synchronous reduction of SrO and MgO from a mixture of MgO, SrO, Si, CaO. The equipment, reduction temperature and vacuum for the new process have been also discussed.

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Xie, Di, Hui Chen, Siyi Yin, Feisen Wang, Jingwen Chen, and Sifei Ai. "Effect of different laser energy densities on the corrosion resistance of aluminum alloys." Anti-Corrosion Methods and Materials 67, no. 5 (June 19, 2020): 437–44. http://dx.doi.org/10.1108/acmm-02-2020-2263.

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Purpose Laser cleaning, as a new type of cleaning technology, has the advantages of environment-friendliness, better selectivity, better controllability and higher efficiency compared to traditional chemical cleaning or grinding. This paper aims to use ultra-fast surface laser cleaning equipment built in laboratory to study the influence of different energy density (7.6, 11.5 and 15.3 J/cm2) on corrosion resistance of the aluminum alloy A7N01P-T4, a high-speed train body material. Design/methodology/approach SEM, white light interferometer, EDS and XPS were used to analyze the surface morphology, roughness, element content and oxide layer composition of aluminum alloy before and after cleaning. The corrosion resistance was studied by electrochemical experiments and exfoliation corrosion experiments. Findings The results showed that new oxide scale was formed on the surface after laser cleaning. The changes of surface roughness and chemical composition of oxide scale made a significant influence on corrosion behaviors. Better corrosion resistance was obtained with the energy density increased, and at the energy density of 11.5 J/cm2, aluminum alloy exhibited the best corrosion resistance. Research limitations/implications The paper only studies specific aluminum alloys and is not universal. Laser cleaning equipment is set up for the laboratory and has not yet been put into industrial production. Practical implications This paper indicated that ultra-fast laser processing was a new direction for the development of industrial equipment surface cleaning and carried out ultra-fast laser of aluminum alloy surface cleaning had certain research significance for its corrosion resistance. Social implications Compared with the conventional cleaning methods such as air abrasives grinding or chemical cleaning, laser cleaning has advantages of environment-friendliness, better selectivity, better controllability and higher efficiency. Laser cleaning can not only protect the environment, but also improve cleaning efficiency. Originality/value Changes in the surface of aluminum alloys after ultra-fast surface laser treatment were found, and the mechanism of changes in aluminum alloy corrosion properties was clarified.

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Florea, Iulia, Gheorghe Buluc, Romeu Chelariu, Elena Raluca Baciu, and Ioan Carcea. "Microstructure and Corrosion Properties Investigations of AlCrNiCuMn High-Entropy Alloy." Advanced Materials Research 1128 (October 2015): 127–33. http://dx.doi.org/10.4028/www.scientific.net/amr.1128.127.

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Using new high entropy alloy with chemical formula AlCrNiCuMn produced by high technology (induction melt method), in manufacture of new composite materials will enable the creation of new structures resistant to stress used dynamic collective protection. Specify that High Entropy Alloys are characterized as alloys consisting of approximate equal concentrations of at least five metallic elements and are claimed to favor close-packed, disordered structures due to high configurational entropy. In this study, we investigate the microstructure and corrosion properties of AlCrNiCuMn high-entropy alloys. The type of high entropy alloys manufactured was a five-component alloy of AlCrNiCuMn. The microstructure and corrosion resistance property of high-entropy alloys AlCrNiCuMn were determined by scanning electron microscopy and electrochemical workstation. Microstructural characterization was performed by electron microscopy on LMHII VegaTescan equipment using a secondary electron detector (SE) at a voltage of 30 kV electron gun.

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43

Dobra, Ramona Monica, Nicolae Farbas, and Doru Romulus Pascu. "Evaluation of Abrasive Wear Resistance of Fe-Cr-C Hardfacing Alloys Deposited on Active Components of the Agricultural Components." Advanced Materials Research 1029 (September 2014): 188–93. http://dx.doi.org/10.4028/www.scientific.net/amr.1029.188.

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In most of the engineering applications, such as mining, agriculture, metallurgy, the equipments fail due to abrasive wear. Hardfacing is one of the most economical and most widely used methods of improving surface characteristics of engineering equipments (wear, corrosion) without changing the bulk properties of the components.Fe-Cr-C hardfacing alloys are well known for their excellent performances under severe wear conditions. The wear behaviour of hardfacing alloys depends on their chemical composition, on the microstructure obtained after welding, of the welding technology, respectively the welding parameters which strongly influence, for example, the dilution with the base material or formation of precipitated hard phases.The aim of this study was to characterize the microstructure of Fe-Cr-C hardfacing alloys and to investigate their abrasive wear behaviour. The research has been carried out using four types of Fe-Cr-C hardfacing alloys (8 12, 16 and 20 % Cr). The alloys were deposited on the low-carbon steel S355 JR by manual arc welding method. The abrasion wear testing was carried out using the Taber Rotary Abraser Equipment. The microstructure characterization and surface analysis were performed using optical microscopy and HV 10 hardness tests.

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Mech, Rafał, Jolanta Gąsiorek, Amadeusz Łaszcz, and Bartosz Babiarczuk. "Influence of the Nb and V Addition on the Microstructure and Corrosion Resistance of the Fe-B-Co-Si Alloy." Materials 14, no. 14 (July 20, 2021): 4045. http://dx.doi.org/10.3390/ma14144045.

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The paper presents a comparison of the results of the corrosion resistance for three Fe-B-Co-Si-based newly developed alloys with the addition of Nb and V. The corrosion performance differences and microstructure variations were systematically studied using scanning electron microscope, electric corrosion equipment, X-ray diffractometer, and differential calorimeter. It has been shown that each alloying addition increased the corrosion resistance. The highest corrosion resistance obtained by potentiodynamic polarization was found for the alloy with both Nb and V addons (Fe57Co10B20Si5Nb4V4) and lowest in the case of the basic four-element Fe62Co15B14Si9 material. This shows that the proper choice of additions is of significant influence on the final performance of the alloy and allows tailoring of the material for specific applications.

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45

Kim, Ji Hui, Kwang Su Na, and Seon Jin Kim. "The Cavitation Behavior of Fe-Cr-C-Si-Ni Alloys." Materials Science Forum 510-511 (March 2006): 274–77. http://dx.doi.org/10.4028/www.scientific.net/msf.510-511.274.

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The cavitation erosion behavior of Fe-Cr-C-Si-xNi (x = 1, 2 and 3 wt.%) alloys were investigated for 50 hours using a 20 kHz vibratory cavitation erosion test equipment. 1 wt.% Ni added Fe-based hardfacing alloy showed excellent cavitation erosion resistance, comparable to the stellite 6. Above 1 wt.% Ni, however, the erosion resistance deteriorated quickly. It is conjectured that Ni addition above 1 wt.%, which has been shown to increase the stacking fault energy (SFE), resulted in reduction of the work hardening rate during the erosion test. Therefore, the enhanced cavitation erosion resistance of the 1 wt.% Ni alloy over the 2 and 3 wt.% Ni alloys could be explained in terms of the SFE, Ms temperature and work hardening.

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46

Baek, Min-Sook, Ki-Bok Heo, Dong-Joo Yoon, and Byung-Il Kim. "Design of High Corrosion Resistant Ni Alloy Using Electronic State Calculation." Journal of Nanoscience and Nanotechnology 19, no. 6 (June 1, 2019): 3571–75. http://dx.doi.org/10.1166/jnn.2019.15955.

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Ni alloys are used as the prominent industrial material for heat-resistance and corrosion-resistance. Out of them, Inconel has excellent properties for high-temperature heat-resistant equipment as an excellent material for equipment such as ultrahigh-temperature electric furnace and or boiler. However, Ni alloys used in various areas contain high-priced metals such as Ta, Nb, or Re and their use have been limited to industrial sector so far due to the price incompetence. In this study, the alloy Ni–28Cr–4Mo–2Ti was designed by electronic state calculation by replacing the expensive material of Ta and Nb in Inconel 625 with Ti. In order to compare the corrosion properties, they were intentionally corroded in a furnace at 500 °C for 3 months and potentiodynamic polarization method was used to check the corrosion rate. The validity of the results was also confirmed by using the values of atomic radius and electronegativity. As a result, it was confirmed that the newly designed alloy had superior corrosion resistance at higher temperature than Inconel 625.

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47

Hernández, Alfredo, J. Federico Chávez, and Raquel E. Hernández. "Simplified Rheocasting of Al-Si Alloys Sheared by Mechanical Stirring." Key Engineering Materials 651-653 (July 2015): 1545–50. http://dx.doi.org/10.4028/www.scientific.net/kem.651-653.1545.

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A rheocasting prototype for the semi-solid processing of Al-Si alloys was designed and assembled at laboratory scale, this is the first attempt for the development of S2P equipment in Mexico. This work describes the simplified method of mechanical stirring and the calculation of the theoretical parameters for the operation of the experimental device in order to provide shear rate into the slurry by a stainless steel impeller inside a crucible made of hot work steel. Moreover, a vertical pressure die-rheocasting system it is applied with the semi-solid alloy flowing counter the position of the injector during the displacement of the crucible in order to fill the mold. New design is applied in this rheocasting equipment.The semi-solid state with thixotropic behavior is produced in the stirred AlSi7Mg alloy; this condition allows the non-dendritic morphology because the intensively stirring at the beginning of the solidification produces the trimming of dendrites, growing so the primary solid (α) in globular shape surrounded by eutectic microstructure. Preliminary microstructural characterization was performed.

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48

Zolotukhin, V. I., A. G. Golovko, E. I. Gordeev, and D. A. Provotorov. "MODERN EQUIPMENT FOR REFINING AND CASTING OF STEEL AND ALLOYS IN FOUNDRY PRODUCTION." Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY), no. 1 (April 6, 2018): 28–33. http://dx.doi.org/10.21122/1683-6065-2018-1-28-33.

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The article deals with the issues of complex technology and equipment for refining and casting steel and alloys in the foundry industry. Solutions are given that make it possible to guarantee a reduction in nonmetallic inclusions in the melt, as well as to solve a number of other related problems of foundry production, such as the introduction of a bottom blowing melt system with an inert gas; the introduction of protection of the metal stream from secondary oxidation; lining the arch of an electric arc furnace, etc. Various types of products and equipment produced by NPP Vulkan-TM are shown: blowing bottom plugs and assemblies, metering nozzles, gas-dynamic protection of the metal stream from secondary oxidation, two-arm wire-feeding machine mod. TAP 2–1 with unwinding device.Advantages of the equipment for steel casting and extra-furnace steel processing are described.

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Urazbahtin, F. A., and A. YU Urazbahtina. "Multifactor mathematical model of criticality of welding process of products from aluminum- magnesium alloys." Vestnik Mashinostroeniya, March 2020, 12–18. http://dx.doi.org/10.36652/0042-4633-2020-3-12-18.

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A multifactor mathematical model of the welding process of products from aluminum-magnesium alloys, consisting of 71 indicators that assess the quality of the weld, the welding process, costs, equipment operation and quality of the welded material. The model can be used to control and optimize the welding process of products from aluminum-magnesium alloys. Keywords welding, products, aluminum-magnesium alloy, indicators, process parameters, welding equipment, welding materials, electrode sharpening, lining uras_51@mail.ru

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"INCONEL ALLOY 686." Alloy Digest 42, no. 1 (January 1, 1993). http://dx.doi.org/10.31399/asm.ad.ni0421.

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Abstract INCONEL ALLOY 686 has a higher Cr + Mo + W content than the current generation of corrosion-resistant nickel-base alloys and exhibits improved corrosion resistance over them. The alloy could be used in reducing mineral acids and FGD equipment. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on high temperature performance, and corrosion resistance. Filing Code: Ni-421. Producer or source: Inco Alloys International Inc.

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