Relevant bibliographies by topics / Rolling (Metal-work)

Academic literature on the topic 'Rolling (Metal-work)'

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Published: 4 June 2021
Last updated: 28 July 2024

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Journal articles on the topic "Rolling (Metal-work)"

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Urazov, V., A. D. Danilov, K. Yu Gusev, P. Yu Gusev, and D. N. Meshkov. "The rolling simulation for cold work metal hardening." Journal of Physics: Conference Series 2094, no. 4 (November 1, 2021): 042023. http://dx.doi.org/10.1088/1742-6596/2094/4/042023.

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Abstract This article describes the results of a calculation and experimental analysis of destructive physical phenomena that appear in critical sections of industrial and power-related equipment, and lead to occurrence of various operational damages. It was shown that pipeline welded connections are the sections most prone to crack development, therefore the traditional strength calculations need to be combined with fracture mechanics criteria and thorough materials analysis of flawing and structural imperfection. The cold work hardening technique was proposed as a solution for the problem of critical sections performance property restoration. The technique uses surface plastic deformation phenomenon to change the material’s throughthickness stress distribution. In order to optimise surface hardening for welded connections prone to defect formation, we proposed a simulation for analysing an actual pipeline sections load. To assess the applicability of the simulation results, the cold work hardening technique was developed and introduced using a full-scale test sample for damaged areas of welded connections in ø426×40 vent pipes at Novovoronezh NPP Unit No.5.
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Ishchenko, Anatoliy, Viktor Artiukh, Vladlen Mazur, Albina Calimgareeva, and Miroslava Gusarova. "Experimental study of horizontal impact forces acting on equipment of thick sheet rolling stands during rolling." MATEC Web of Conferences 239 (2018): 01041. http://dx.doi.org/10.1051/matecconf/201823901041.

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Technical aspects, methods and results of experimental studies of reversing rolling stands details horizontal accelerations of thick sheet rolling mills 3000 and 3600 are shown. Sequence of horizontal movements of bottom work roll with chocks in windows of housings during normal metal-in, steady rolling and metal-out is given. Usage of obtained experimental data and calculation of horizontal forces of work rolls chocks impacts against housings provided execution of stress calculations of technical solutions for increase of rolling stands durability.
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Wang, Qiao Yi, Yao Zhu, Rui Jin Gao, and Yong Zhao. "Theoretical Study of the Dynamic Effects Based on Work-Roll Model in Metal Sheet Rolling Process." Advanced Materials Research 538-541 (June 2012): 595–600. http://dx.doi.org/10.4028/www.scientific.net/amr.538-541.595.

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A new analytical model for the configuration of a four-high rolling mill stand is proposed in this article. Using the model, the dominant sources of stiffness in the fifth octave and the third octave models are identified. The assumptions made for the derivation of the model are that the work rolls are isotropic linear elastic, that there is no gap or separation between the work roll and the backup roll at all times. In addition, only the vertical interactions of the work roll and the roll-bite are considered. The nonlinear characteristics of this dynamic system are contributed from the contact area of the work roll and the backup roll. Analyses show that the natural frequency of the nonlinear analytical model matches the fifth octave rolling chatter, and the dominant parameters of the dynamic instability are characterized. The effects of inter-stand tensions, rolling speeds, friction between the work roll and the metal sheet roll-bite, and the thickness of the metal sheet on rolling chatter are discussed in the analysis of the dynamics of the rolling model.
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Chen, Jianjun, Chaojie Wu, and Jiacong Ying. "Application of Extended Finite Element Method for Studying Crack Propagation of Welded Strip Steel in the Cold Rolling Process." Materials 16, no. 17 (August 28, 2023): 5870. http://dx.doi.org/10.3390/ma16175870.

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In the cold rolling process, edge cracks, particularly those near the welded zone, can inadvertently lead to strip rupture. This study employed the extended finite element method (XFEM) to analyze the crack propagation behavior in welded strip steel during cold rolling. Various tests such as the tensile test, essential work of fracture (EWF) test, spherical indentation method, and elastoplastic finite element simulations were conducted to determine the maximum principal stress and fracture energy utilized in XFEM for the base metal and weld metal, respectively. A continuous cold rolling model was established to investigate the crack propagation behaviors in the base metal, weld metal, and the interface between the base and weld metal. In the continuous rolling process, the crack propagation and expansion speed in the base metal are much larger than that of the weld zone. In addition, the base metal at the back end of the rolled piece is more prone to fracture than the base metal at the front end.
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Lin, Y. J., C. S. Suh, R. Langari, and S. T. Noah. "On the Characteristics and Mechanism of Rolling Instability and Chatter." Journal of Manufacturing Science and Engineering 125, no. 4 (November 1, 2003): 778–86. http://dx.doi.org/10.1115/1.1617981.

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A nonlinear model describing the dynamical interaction between work rolls and metal sheets and the initiation of fifth octave rolling chatter is presented. The model, which comprises a work roll sub-model and a metal sheet roll-bite sub-model, enables the instability of strip rolling to be qualitatively and quantitatively studied as a function of rollstack stiffness, rolling speed, inter-stand tension, roll-bite entry and exit thickness, and the sheet force resulted from the interactive action of the work roll with the plastic deformation of the rolled strip. It is concluded that, even though the governing dynamics is highly nonlinear, rolling chatter instability is none other than mode excitation or beating, and thus linear. Analyzed results correspond well with what have been observed in physical rolling mills. Specifically, the natural frequency predicted for a 4-H rolling stand fits the fifth octave chatter at 550∼650 Hz and there is a critical rolling speed (2.54 m/sec for the material and sheet configurations considered in the paper) beyond which rolling instability will occur. This research establishes the fundamental knowledge base required for the understanding of chatter characteristics and mechanism, and thus provides the essential bases for effective control of rolling instability and chatter-free roll mill design.
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Valentyna, POLIUHA, DEMCHENKO Victoriya, and DOSKOCH Olexandr. "METAL ROLLING MARKET IN UKRAINE." INTERNATIONAL SCIENTIFIC-PRACTICAL JOURNAL "COMMODITIES AND MARKETS" 36, no. 4 (December 10, 2020): 16–28. http://dx.doi.org/10.31617/tr.knute.2020(36)02.

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Background. The production of rolled metal belongs to the field of metallurgy, the mainstay of the Ukrainian economy. Metal rolling is used both in metallurgy and in other industries like aircraft construction, mining, oil and refining. The aim is to characterize the volume of production, sales, imports and exports of rolled metal in Ukraine; comparison of average prices for the investigated product in Ukraine according to trading companies. Materials and methods. The work uses general and special methods of analysis and synthesis, a systematic approach, scientific generalization and comparison of data from scientific sources, as well as open sources of statistical information. Results. In the period from 2015 to 2019, there was a generally positive trend of increasing the volume of rolled metal production in Ukraine, with the exception of some types of rolled metal. During 2015–2019 it should be noted the increase in production of rods and bars almost 2 times; pipes – by 30.4 %; corners, shaped and special profiles – more than 4 times; profiled sheets – by 33.3 %; multilayer panels – by 36.8 %; wire – only 13 %. During 2015–2019 there is a decline in production of some types of rolled metal: profile – by 32.8 %; products for railway and tram tracks – almost 2 times; fittings for pipes – by 34.7 %. The largest amount of rolled metal in Ukraine in 2019 was produced by Arcelor­Mittal Kryvyi Rih – 4.7 million tons. In 2019 the largest share of rolled metal produced by Metinvest Holding LLC was produced by Zaporizhstal (3.5 million tons) and Ilyich Mariupol MK (2.6 million tons). A fairly wide range of rolled metal products is sold on the Ukrainian market. Sales of rolled metal products in Ukraine during 2015–2019 increased by 14 %. Volumes of rolled metal exports during 2015–2019 significantly exceeded imports. This trend is natural, because on the territory of Ukraine there are quite powerful producers of rolled metal, which are able to compete at a high level with foreign ones. Conclusion. During 2015–2019, there is a tendency to reduce production volu­mes and increase sales of rolled metal. Exports significantly exceed the volumes of rolled metal imports. In the context of the coronavirus pandemic, rolled metal producers need to opti­mize their activities by modernizing production and implementing investment projects in their activities to increase their competitiveness.
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Mazur, Vladlen, Viktor Artiukh, Yuriy Sagirov, and Sergey Kuznezov. "Experimental determination and study of horizontal forces during rolling." MATEC Web of Conferences 239 (2018): 01042. http://dx.doi.org/10.1051/matecconf/201823901042.

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Results of experimental and theoretical studies of horizontal accelerations of rolls, chocks and housings of strip/sheet rolling stands are shown. Relations between horizontal forces and dynamic rolling torques, sequence of their arise are described. Significant influence of gaps in system ‘chock – housing’ and radial gaps in main drive lines on values of work rolls chocks horizontal impacts against housings is proved. Influence of rolled metal dimensions, mass and speed of rolled metal before metal-in on dynamic forces of work rolls chocks horizontal impacts against housings is described by means of developed mathematical relation.
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Dobryak, V. D., D. Yu Ugryumov, Yu M. Nykolayenko, and I. A. Solovyova. "Condition and development of methods for dividing a hot metal to measured lengths." Fundamental and applied problems of ferrous metallurgy 37 (2023): 324–39. http://dx.doi.org/10.52150/2522-9117-2023-37-324-339.

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Analysis of hot metal dividing methods into measured lengths from the point of view of providing the required quality of their ends after separation, as well as high performance methods is the aim of the work. This is especially important for the preparation of hot metal for subsequent processing, including rolling and tube rolling units, where high quality of the ends of the workpieces reduces the end cut and metal consumption ratios, and tube quality also improves the quality of rolled steel shells and pipes. Well-known literary and patent sources in the field of the separation of hot metal into measured lengths both during continuous casting of steel and in subsequent redistribution, are researched in this work. As a result of the analysis, it has been established that widely used methods for the separation of hot metal in practice cannot provide high quality pipe ends after separation, which increases the metal loss in subsequent redistribution. The most promising for the separation of hot metal into measured lengths in rolling and tube-rolling production is hot-abrasive cutting and cutting with rotary saws. They are becoming more common in production. The practical significance of the results presented in this paper are proposals for the use of progressive methods for separation of hot metal both in terms of high productivity and, above all, the required quality of the resulting ends after separation for subsequent redistribution. The development directions of the analyzed methods for the separation of hot metal are considered. A waste-free two-stage method has been proposed for dividing round hot billets into dimensional parts, which improve the quality of the ends for subsequent rolling of pipes.
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Aleshchenko, A. S., A. S. Budnikov, and E. A. Kharitonov. "METAL FORMING DURING PIPES REDUCTION ON A THREE-HIGH ROLLING MILL." Izvestiya. Ferrous Metallurgy 62, no. 10 (November 3, 2019): 756–62. http://dx.doi.org/10.17073/0368-0797-2019-10-756-762.

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Pipe rolling plants (PRP) with three-high screw rolling mills are used to produce hot-rolled seamless pipes. In Russia, two such rolling units are used: PRP 160 at Pervouralsk Novotrubny Plant and PRP 200 at Volzhsky Pipe Plant. Recently, the most acute issue is increasing their technological capabilities. There is a need of expanding size and grade mix, as well as non-traditional use of gauge and rolling mill for screw rolling. The paper presents results of experimental study of the process of reduction or un-adjusting rolling of pipes on three-high screw rolling mills with an increase in reduction of diameter up to 25 %. The results of computer finite element modeling in QFORM program are provided. The aim of this work was to study effect of rolling process with increased reduction in diameter on change of metal form in deformation zone and changes in geometrical dimensions at reduction of cups with different wall thickness on the pilot mill. Important role in process of metal forming during screw rolling (especially when rolling hollow products and pipes) plays cupped blank ovality that is equal to the ratio of the roll radius when the metal comes in contact with the roller to the radius under the roller in the cross section of deformation zone. Ovality characterizes stability of change in geometric dimensions of pipes and their resistance to deformation in inter-roll space. The reduction of thin-wall cupped blank is accompanied by large va lues of ovality, deformation process is less stable, and as a result, form defects (faceting) and end defects occur during plug rolling. Ovality at plug rolling increases more intensely in comparison with plugless rolling. Presence of plug limits displacement of metal in axial direction and contributes to displacement of metal in gaps between rollers. At plugged rolling, it is necessary to use rolls with collars allowing main reduction along the wall, thereby localizing reduction zone on the plug, and reducing ovality of cupped blanks.
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Chang, Der-Form. "Thermal stresses in work rolls during the rolling of metal strip." Journal of Materials Processing Technology 94, no. 1 (September 1999): 45–51. http://dx.doi.org/10.1016/s0924-0136(98)00449-x.

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Dissertations / Theses on the topic "Rolling (Metal-work)"

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劉光磊 and Guanglei Liu. "Modelling of cold rolling textures in mild steel." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1998. http://hub.hku.hk/bib/B31237435.

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Liu, Guanglei. "Modelling of cold rolling textures in mild steel /." Hong Kong : University of Hong Kong, 1998. http://sunzi.lib.hku.hk/hkuto/record.jsp?B19712790.

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Ranatunga, Padmasiri Vipul. "Modeling of profile ring rolling with upper bound elemental technique." Ohio : Ohio University, 2002. http://www.ohiolink.edu/etd/view.cgi?ohiou1178730881.

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Ye, Xing. "Thermal crown development in hot strip mill work rolls and the role of spray cooling." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/30124.

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The objective of this investigation was to determine the influence of work roll cooling on roll thermal behavior. The investigation has been conducted utilizing a previously developed computer model [1]. Three industrial operations were evaluated and features of an optimum configuration have been identified. The magnitude of the thermal zone near the roll surface within which the cyclic temperature variation is confined has been evaluated for different roll cooling conditions. A two dimensional thermal model of a work roll has been developed to predict the thermal field inside the roll, based on which the thermal crown of the roll was calculated under an assumption of axi-symmetric deformation. The heat transfer equation was solved by the numerical finite difference method, the Alternating Direction Implicit (ADI) method. This method makes it possible to solve the problem on a personal computer making it suitable for industrial application due to the minimum requirements of computer storage and time. Also because the thermal model simulates operating conditions including the cooling configuration it is of value in studying a variety of industrial rolling conditions. The influence of roll spray arrangement, roll gap heat transfer and mill pacing on roll thermal crown has been investigated.
Applied Science, Faculty of
Materials Engineering, Department of
Graduate
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Su, Yea-Yang. "Pitting degradation of H-13 steel rolls in hot copper rolling." Thesis, Georgia Institute of Technology, 1991. http://hdl.handle.net/1853/18952.

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Lee, Yew-wing. "The effect of cold rolling on the formability of thermoplastics /." [Hong Kong] : University of Hong Kong, 1987. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12334364.

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Lee, Yew-wing, and 李耀榮. "The effect of cold rolling on the formability of thermoplastics." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1987. http://hub.hku.hk/bib/B31207716.

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Chen, Yongjin, and 陳永進. "Effects of rolling conditions on texture and microstructure development in [alpha] brass." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2000. http://hub.hku.hk/bib/B31239997.

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Basabe, Mancheno Vladimir Vinicio 1968. "Scale formation and descaling in hot rolling of low carbon steel." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=115671.

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In this research, the effects of gas composition, elapsed time of reaction and temperature on scale formation and descaling of low carbon steel were investigated and results were discussed from the viewpoint of the phase composition of the scales, oxidation rates, oxidation mechanisms, adhesion, fracture mechanics, porosity and residual scale.
The phase composition and morphology of scales grown under conditions similar to those of reheating furnaces were analyzed. Low carbon steel was oxidized over the temperature range 1000-1250°C in gas mixtures of O 2-CO2-H2O-N2, O2-H 2O-N2 and O2-CO2-N2. The mole fraction of each phase, wustite (FeO), magnetite (Fe3O 4) and hematite (Fe2O3) was determined by the direct comparison method Two types of scales were observed. The first type was a crystalline scale with an irregular outer surface composed mostly of wustite, and a negligible amount of magnetite. The second type was the classical three-layer scale composed of wustite, magnetite and hematite. In general, the experiments showed that the furnace atmosphere, oxidation time and temperature influence the phase composition of the scales.
Low carbon steel was oxidized in air over the temperature range 600-1200°C for 120 s to approximate the formation of secondary and tertiary scale in hot rolling. The mole fraction of wustite, magnetite and hematite was determined by the direct comparison method The phase composition of the scales changed with temperature and time. During the initial 30 s of oxidation, wustite was the predominant phase in the temperature range 800-1200°C, and as oxidation proceeded, the percentages of magnetite and hematite increased. In addition, the texture of the scales was investigated by orientation imaging microscopy (OIM); it was found that temperature influences the texture of the scales. The experiments indicated that 850°C is the ideal temperature for the finishing mill in order to reduce surface defects and work roll wear.
The adhesion of scales formed in air on low carbon steel in continuous heating and isothermal conditions was investigated with a four-point bending test. The separation (crack) always occurred inside the scale indicating that the strength of the scale is lower than the strength of the scale/steel interface. It was found that scale adhesion is related to scale porosity, blister formation and stresses acting in the scale. A spallation process was observed when cooling from 800°C to room temperature. The microscopic observations revealed that spallation followed route 1 "strong interface and weak oxide."
Low carbon steel was oxidized over the temperature range 1050-1250°C in O2-CO2H2O-N2 gas mixtures in order to study the hydraulic descaling process. The oxidation times were 15-120 min. and the scales were 130-2000 mum thick. The experimental parameters were chosen to approximate scale formation under conditions similar to those of reheating furnaces. In the hydraulic descaling tests, two modes of scale removal were observed. In the first mode, observed in classical three-layer scales that developed an inner porous layer with low or medium porosity, the horizontal undercutting occurred at the boundary of the inner porous layer and dense scale. The second mode was observed in classical three-layer scales that developed an inner porous layer with high porosity and in crystalline scales. In the second mode, the horizontal undercutting occurred at the first plane of large pores relative to the scale/steel interface. In general, the experiments showed that scale morphology controlled the removability of scale.
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Freyer, Burkhard Heinrich. "Gauge and tension control during the acceleration phase of a steckel hot rolling mill." Diss., University of Pretoria, 2002. http://hdl.handle.net/2263/24580.

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Please read the abstract in the section, 00front of this document
Dissertation (M Eng (Electronic Engineering))--University of Pretoria, 2002.
Electrical, Electronic and Computer Engineering
MEng
unrestricted
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Books on the topic "Rolling (Metal-work)"

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China) International Symposium on Advanced Rolling Equipment Technologies (2010 Taiyuan Shi. Advances in rolling equipment and technologies: Selected, peer reviewed papers from the International Symposium on Advanced Rolling Equipment Technologies (ISARET2010), 23-24 September 2010, Taiyuan, China. Stafa-Zurich: Trans Tech Publications, 2011.

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Shevakin, I︠U︡riĭ Fedorovich. Obrabotka metallov davleniem. Moskva: Intermet Inzhiniring, 2005.

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Levchenko, L. N. Valʹt͡s︡ovshchik stanov gori͡a︡cheĭ prokatki. Moskva: "Metallurgii͡a︡", 1986.

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Pogorzhelʹskiĭ, Viktor Ivanovich. Kontroliruemai͡a︡ prokatka nepreryvnolitogo metalla. Moskva: "Metallurgii͡a︡", 1986.

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Bochkov, N. G. Proizvodstvo kachestvennogo metalla na sovremennykh sortovykh stanakh. Moskva: "Metallurgii͡a︡", 1988.

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International Conference on Modernization of Steel Rolling (1989 Beijing, China). Modernization of steel rolling: Proceedings of International Conference, Beijing, China, April 10-15, 1989. Beijing: International Academic Publishers, 1988.

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Henkel, Johannes. Anwendung der Kalt- und Halbwarmumformung beim Ringwalzen. Düsseldorf: Stahleisen, 1991.

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N, Vydrin V., ed. Teorii͡a︡ i tekhnologii͡a︡ prokatki: Tematicheskiĭ sbornik nauchnykh trudov. Cheli͡a︡binsk: Cheli͡a︡binskiĭ politekhn. in-t im. Leninskogo komsomola, 1987.

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Kurz, Norbert. Grundlagen für das Kaltwalzen von Voll- und Hohlkörpern nach dem Grob-Verfahren. Berlin: Springer-Verlag, 1987.

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Nikolaevich, Taran I͡U︡riĭ, ed. Obrabotka metallov davleniem. Kiev: "Tekhnika", 1985.

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Book chapters on the topic "Rolling (Metal-work)"

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Hitchings, Rob. "Prelims - How to Make a Rolling Machine for Sheet Metal Work." In How to Make a Rolling Machine for Sheet Metal Work, 1–4. Rugby, Warwickshire, United Kingdom: Practical Action Publishing, 1985. http://dx.doi.org/10.3362/9781780442402.000.

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Hitchings, Rob. "1. How to Make a Rolling Machine for Sheet Metal Work." In How to Make a Rolling Machine for Sheet Metal Work, 5–28. Rugby, Warwickshire, United Kingdom: Practical Action Publishing, 1985. http://dx.doi.org/10.3362/9781780442402.001.

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Kumar, Sanjeev, and Erwin Povoden-Karadeniz. "Plastic Deformation Behavior in Steels during Metal Forming Processes: A Review." In Plastic Deformation in Materials [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.97607.

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The plastic deformation occurs in steels during metal forming processing such as rolling, forging, high-pressure torsion, etc. which modify mechanical properties of materials through the grain refinement, and the shape change of objects. Several phenomena in the scope of plastic deformation, such as hardening, recovery, and recrystallization are of great importance in designing thermomechanical processing. During the last decades, a focus of research groups has been devoted particularly to the field of metals processing of steel parts through plastic deformation combined with specific heat treatment conditions. In this review chapter, the current status of research work on the role of plastic deformation during manufacturing is illuminated.
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Kobayashi, Shiro, Soo-Ik Oh, and Taylan Altan. "Three-Dimensional Problems." In Metal Forming and the Finite-Element Method. Oxford University Press, 1989. http://dx.doi.org/10.1093/oso/9780195044027.003.0017.

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A majority of the finished products made by metal forming are geometrically complex and the metal flow involved is of a three-dimensional nature. Thus, any analysis technique will become more useful in industrial applications if it is capable of solving three-dimensional metal-flow problems. Nagpal and Altan introduced dual-stream functions for describing metal flow in three dimensions. This work showed that the proper selection of a flow function makes the incompressibility requirement automatically satisfied and provides general kinematically admissible velocity fields. Yang and Lee utilized the conformal transformation of a unit circle onto a cross-section in the analysis of curved die extrusion. They derived the stream-line equation from which a kinematically admissible velocity field was determined. The upper-bound method was then applied to determine the extrusion pressure for a rigid-perfectly plastic material. An important aspect of three-dimensional plastic deformation is the analysis of spread in metal-forming operations, such as spread in rolling or in flat tool forging, and spread in compression of noncircular disks. Solutions to such problems have been obtained by the use of Hill’s general method and the upper-bound method. The extension of the finite-element method to solve three-dimensional problems is natural and not new, particularly in the area of elasticity. However, the simulation of three-dimensional forming operations by the finite-element method is relatively recent. Park and Kobayashi described the formulation for the three-dimensional rigid-plastic finite-element method and the implementation of the boundary conditions. They applied this technique to the analysis of block compression between two parallel flat platens. For certain forming problems, such as those involving lateral spread, the use of a simplified three-dimensional element is efficient and some examples can be found for analysis of spread in rolling and flat tool forging. The matrices for evaluation of elemental stiffness equations are defined for a three-dimensional brick element in Chap. 6 and some of them are recapitulated in this section. A three-dimensional brick element used for the analysis is an eight-node hexahedral isoparametric element.
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Wu, Hang, Zhaoming Liu, Long Cui, Lirong Guan, and Hongwei Wang. "Digital Twin of Non-Ferrous Metal Casting Robot." In Advances in Transdisciplinary Engineering. IOS Press, 2022. http://dx.doi.org/10.3233/atde220502.

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The robot system for non-ferrous metal casting process can replace a large number of manual operations while ensuring product quality, and complete the casting process independently. The automatic casting process requires a robot to pour molten metal quickly and accurately into a mold that moves in real time. To achieve this, traditional robots adjust the path through manual teaching. The steps of manual teaching take an immense amount of time and effort. In addition, temperature is the main factor affecting the service life of the robot. The service life of various precision parts of the robot will be significantly reduced under the high temperature environment of metal casting. This paper presents a digital twin system for optimizing traditional non-ferrous metal casting robots. By establishing a digital twin platform, twin robots, virtual scenes and the physical world mapping, the problem of long manual teaching time is solved, an algorithm for estimating the service life of the rolling functional parts of the joint bearing is proposed, and the casting robot is obtained. The end joint bearing functional parts work continuously for one day in the actual casting scene, and their service life is reduced by about 3.9%. Estimated service life of robot functional parts can prevent some potential failures of robot equipment and improve the overall service life of the robot.
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Gutsalenko, Yuriy, and Tetyana Tretyak. "FORMATION OF WORKING SURFACES AND RESEARCH OF QUALITATIVE INDICATORS OF NON-EVOLVENT GEARS (REVIEW AND PROSPECTS OF DEVELOPMENT)." In Integration of traditional and innovation processes of development of modern science. Publishing House “Baltija Publishing”, 2020. http://dx.doi.org/10.30525/978-9934-26-021-6-35.

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From the standpoint of the development of possibilities of application in theory and practice, the works of Prof. B. A. Perepelitsa from Kharkov Polytechnic Institute and his disciples to develop an applied methodology of multiparameter mappings in relation to the profiling and functioning of complex curvilinear objects and transmission mechanisms in mechanical engineering, mainly with examples of gears, are presented. The work substantiates the relevance of the study of gears with a complex non-involute profile of the side surfaces of the teeth, which in some applications have advantages over involute gears and are devoid of some of their drawbacks associated with quality indicators. A technique for obtaining mating surfaces of the teeth of non-invasive gears as envelopes of the specified surfaces of the teeth of tools is described. A scheme for forming pairs of non-involute gears, from which a gearing can be composed, is proposed. At the same time, diamond-abrasive tools are considered as shaping the working gear profile in its cutting according to the copying scheme and finishing according to the rolling honing scheme. In the first case, the profile of a special shaped tool on a high-strength metal bond is supported by a master electrode according to the scheme of the anodic connection of the tool into the electric circuit of dressing, similar to diamond spark grinding. In the second case, the use of gear wheels-hones on elastic ligaments is shown. It is shown that to obtain the mating surfaces of the teeth of two non-involute gears, two tool rails can be used with the profiles of the side surfaces of the teeth opposite to each other. As a nonlinear profile of the tooth lateral surface of the tool rail, some part of one of the simulated flat kinematic curves is considered. A description of the program developed in accordance with the described method is given, which allows you to calculate the geometric characteristics of the shaped profiles of the gear pair wheels, visualize the shaping process, and also determine the quality indicators of the gearing. Thus, the prerequisites were created for choosing from the resulting geometric modeling of the curve field of such tooth profiles of the tools, which would provide the most rational combination of the tooth profiles of the gears processed by them and the required quality parameters of the gear teeth. The results of the study of the pressure ratio between the teeth of a gear and the overlap ratio of gears when choosing the shape of the tooth profiles are presented. A series of numerical experiments for gearing, formed by pairs of tool rails with different profiles of the side surfaces of the teeth straight, convex and concave, as well as convex-concave were performed. It is shown that non-involute gearing can have large reduced radii of curvature (and consequently smaller pressure coefficients) at the points of tangency of the profiles compared to involute gearing with a slight increase or decrease in the gearing overlap ratio. The most preferable is the variant of the rails with convex and concave tooth profiles, which provides the best values of both quality indicators of the engagement.
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Kobayashi, Shiro, Soo-Ik Oh, and Taylan Altan. "Steady-State Processes of Extrusion and Drawing." In Metal Forming and the Finite-Element Method. Oxford University Press, 1989. http://dx.doi.org/10.1093/oso/9780195044027.003.0013.

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Except at the start and the end of the deformation, processes such as extrusion, drawing, and rolling are kinematically steady state. Steady-state solutions in these processes are needed for equipment design and die design and for controlling product properties. A variety of solutions for different conditions in extrusion and drawing have been obtained by applying the slip-line theory and the upper-bound theorems. Early applications of the finite-element method to the analysis of extrusion have been for the loading of a workpiece that fits the die and container, and for the extrusion of a small amount of it rather than extruding the workpiece until a steady state is reached. An exception is the work by Lee et al. for plane-strain extrusion with frictionless curved dies using the elastic-plastic finite-element method. In view of the computational efficiency, various numerical procedures particularly suited for the analysis of steady-state processes have been developed by several investigators. Shah and Kobayashi analyzed axisymmetric extrusion through frictionless conical dies by the rigid-plastic finite-element method. The technique involves construction of the flow lines from velocities and integration of strain-rates numerically along flow lines to determine the strain distributions. An improvement of the method was made by including friction at the die-workpiece interface. The steady-state deformation characteristics in extrusion and drawing were obtained as functions of material property, die-workpiece interface friction, die angle, and reduction. In kinematically transient or nonsteady-state forming problems, a mesh that requires continuous updating (Lagrangian) is used. In steady-state problems, a mesh fixed in space (Eulerian) is appropriate, since the process configuration does not change with time. For steady-state problems whose solutions depend on the loading history or strain history of the material, combined Eulerian-Lagrangian approaches are necessary. In deformation of rigid-plastic materials under the isothermal conditions, the solution obtained by the finite-element method is in terms of velocities and, hence, strain-rates. In the nonsteady-state processes, the effective strain-rates are added incrementally for each element to determine the effective strains after a certain amount of deformation.
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Conference papers on the topic "Rolling (Metal-work)"

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PUSTOVOYTOV, Denis, Alexander PESIN, Natalya LOKOTUNINA, and Anna KOZHEMIAKINA. "Influence of small microscopic grooves of work rolls on strain gradient induced in metal sheets during symmetric and asymmetric rolling." In METAL 2019. TANGER Ltd., 2019. http://dx.doi.org/10.37904/metal.2019.701.

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Nelson, Andrew W., Feng Zhang, Arif S. Malik, and Mark E. Zipf. "Sizing Design for 4-High Cold Rolling Mills." In ASME 2014 International Manufacturing Science and Engineering Conference collocated with the JSME 2014 International Conference on Materials and Processing and the 42nd North American Manufacturing Research Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/msec2014-4137.

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As the demand for thin and ultra-thin gage for cold-rolled sheet metals increases, cold rolling manufacturers and sheet metal producers must utilize technological advancements to stay competitive globally. To manufacture a competitive rolling mill, the mill designer must identify an appropriate mill configuration, roll sizes, and flatness control systems, etc. The design must be robust enough to accommodate broad product envelopes containing strips of different widths, gages, and materials. At the same time, the mill “sizing” must be competitive by avoiding over- or under-design. These two objectives, designing a robust mill and remaining competitive, tend to conflict, which establishes the need for optimal mill design based on rigorous multidisciplinary analysis. Conventionally, mill design is done using a ‘sequential’ design approach relying heavily on experience. The major limitation of sequential mill design is that it can lead to over-design or under-design since it segregates design tasks for the coupled components, making it difficult to consider many combinations of the design space. The result is a ‘feasible’ rather than ‘optimum feasible’ mill design. This work applies nonlinear programming to optimize the basic design of a 4-high reversing cold rolling mill, subject to static strength, fatigue, and strip geometric quality constraints. The work offers an improved multi-disciplinary design approach based on stress and fatigue analysis of rolls, and an efficient strip profile/flatness analysis to identify suitable design limits for roll bending devices.
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Mahapatra, R., Rait Jaspal Singh, Samuel Pappy, Inder Singh, Ajay Kumar, Deepak Saxena, V. Martin, and R. K. Malhotra. "A Study on the Performance of Rolling Oil During Cold Rolling of Stainless Steel Simulating Industrial Condition." In ASME 2012 International Manufacturing Science and Engineering Conference collocated with the 40th North American Manufacturing Research Conference and in participation with the International Conference on Tribology Materials and Processing. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/msec2012-7373.

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The primary role of rolling oil in cold rolling is to reduce friction at the rubbing interface of the work roll and metal sheet surface. The rolling performance as well as cost effectiveness of rolled products is influenced by quality of the rolling oil. Lubricants are required to function under increasingly stressful operating conditions, so it is a challenge to evaluate the product under simulated conditions to improve the customer confidence in its performance. A steel rolling mill customer had requested us to develop a rolling oil to roll stainless steel in a new 3-stand 18-high rolling mill and demonstrate its performance on an experimental set up. The present paper describes the methodology adopted to assess the suitability of a rolling oil for the particular rolling mill. The screening was carried out with a SRV (Schwingungs Reibungs und Verschleisstest, meaning Vibration, friction and Abrasion) tribometer and EHD (Elasto-hydrodynamic) interferometry based film thickness apparatus to assess the frictional and film forming characteristics of the oil under simulated operating conditions. In addition, simulated tests were carried out on a laboratory 2-Hi Experimental rolling mill to find out the specific roll force (rolling force per unit width of the strip being rolled) required to obtain 55–60% cumulative reduction in three passes as desired by the customer for different grades of stainless steel. Based on results obtained in the laboratory mill simulating industrial test conditions, the product was recommended and was accepted by the customer for use in their rolling mill.
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Dubey, Abhay Kumar, Harshal Y. Shahare, Alexander Pesin, Denis Pustovoytov, Hailiang Yu, and Puneet Tandon. "Numerical Modeling of a Hybrid Asymmetric Rolling and Bending Process." In ASME 2021 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/imece2021-69553.

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Abstract Aerospace and automobile industries demand bend sheets with different radii of curvature and in some cases, even the sheets of continuously varying radius of curvature are also required by them. Forming of such parts require a flexible manufacturing process to closely control the radius of the curvature being formed. This work proposes a hybrid forming process that combines asymmetric rolling with incremental bending to form bend sheets with improved mechanical properties. In the proposed hybrid process, thin metal sheets are asymmetrically cold rolled and then bend by a punch placed after the rolling mill, in the direction of sheet flow. The work presents the numerical simulation of the hybrid process and explores the relation between the hammering amplitude and its frequency on the radius of curvature. Besides, the significance of different parameters on the bend sheet being formed is also investigated using analysis of variance (ANOVA). The results show that the velocity ratio and hammering amplitude are the paramount factors in the proposed hybrid process, and these parameters greatly influence the radius of the bend. Simulation results also indicate that the radius of bend can be augmented by decreasing velocity ratio, hammering frequency, and effective amplitude.
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Mehta, Bhavin V., Jay S. Gunasekera, and Rajneesh Banga. "Virtual Material Processing (VMP) on the World Wide Web: Cold Rolling." In ASME 1999 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/detc99/cie-9028.

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Abstract The primary objective of this research work was the development of an engineering package integrated with the Internet, which will allow the user to perform rolling process simulation in a virtual environment on the World Wide Web (WWW). The package should completely analyze the rolling process, which includes plastic analysis of the rolling process using an enhanced slab method. The slab method is very fast and can provide real-time simulation of the process. The virtual environment was developed using tools like Java, VRML, CGI and HTML and is accessible over the Internet from anywhere in the world. This work is a part of a major ongoing project on Virtual Material Processing (VMP), which includes creation of software packages for other manufacturing processes such as extrusion, forging, drawing and sheet metal forming. The Virtual Material Processing (VMP) environment is hardware and operating system independent and does not require powerful workstations or graphics cards. The simulation runs on a powerful server located at Ohio University, while the input/output (text, graphics, animation) can be viewed and accessed by any computer supporting a web browser.
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Zhang, Bin, Yooseob Song, George Voyiadjis, Kristian Juul, Shuai Shao, and Wen Jin Meng. "Texture Development and Mechanical Response in Microscale Reverse Extrusion of Copper." In ASME 2018 13th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/msec2018-6472.

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Axisymmetric reverse extrusion experiments were conducted on annealed Cu rod specimens to form cup-shaped structures with sidewall thicknesses ranging from ∼400 μm down to ∼25 μm. Scanning electron microscopy (SEM) and electron backscatter diffraction (EBSD) were used to examine the changes in Cu grain morphology and texture as a result of the forming operation. Pole figure (PF) and orientation distribution function (ODF) analysis of EBSD data showed the presence of the same texture components in the present small scale metal forming experiments as those observed previously in macroscale sheet metal rolling. Extrusion force – punch displacement curves were measured as a function of extruded cup sidewall thickness. The present work illustrates materials characteristics in small scale metal forming, and suggests directions of future work for bringing improved correspondence between experimentation and modeling for metal micro forming.
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Kuntumalla, Gowtham, Yuquan Meng, Manjunath Rajagopal, Ricardo Toro, Hanyang Zhao, Ho Chan Chang, Sreenath Sundar, et al. "Joining Techniques for Novel Metal Polymer Hybrid Heat Exchangers." In ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-10621.

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Abstract In the United States, over 50% of the unrecovered energy from industrial processes is in the form of low-grade heat (< 220°C). Materials and maintenance costs of common heat exchangers are typically too high to justify their usage. Polymers, though more affordable, are usually unsuitable for HX applications due to their low thermal conductivity (∼0.2 W/mK). Here, we show that metal-polymer hybrids may be attractive from both performance and cost perspectives. The use of polymers further increases the resistance to corrosion by sulfuric and carbonic acids often present in flue gases. An ongoing work explores different configurations of layered polyimide-copper macroscale hybrids for heat exchanger applications using numerical simulations. This paper explores a manufacturing pathway for producing such layered hybrid tubes that involves directly rolling and bonding tapes made of polymer and copper foil into tubes. A critical problem in the fabrication process is the bonding of metal and polymers. We explore approaches involving adhesives (epoxy, acrylic and silicone) for metal/polymer interfaces and direct welding (ultrasonic) for metal/metal interfaces that can be integrated into the manufacturing process. We report characterizations of the thermomechanical properties of these joining processes. This work paves the way for realizing cost-effective manufacturing of heat exchangers for low grade waste heat recovery.
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Raju, D. V., and D. Ravi Kumar. "Finite Element Analysis of Effect of Planar Anisotropy on Springback in Plane Strain Bending." In ASME 2003 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/detc2003/cie-48211.

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In this paper, springback has been determined experimentally in plane strain sheet bending for a sheet with high planar anisotropy at different orientations to the rolling direction. Springback was predicted by analysis of plane strain bending using the Finite Element Method (FEM). The mechanical properties of sheet metal (at different angles to rolling direction) and anisotropic parameters were determined from uniaxial tension tests and were used as the input for FEM analysis. Analytical calculations were also carried out to predict springback at different orientations. Comparison of the results showed that FEM predictions are closer to experimental results than the analytical calculations. The present work is expected to provide more insight into understanding of the effect of anisotropy on springback in sheet bending operations and provide information which can be useful for manufacturers of sheet metal components (involving bending) to choose the optimum orientation of bend axis so as to get the desired quality after forming.
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VINCZE, G. "Effect of prestrain on mechanical behavior of aluminum alloys." In Material Forming. Materials Research Forum LLC, 2023. http://dx.doi.org/10.21741/9781644902479-93.

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Abstract. Sheet metal forming involves many times large plastic strain and strain path changes. It is well known that the plastic behavior of metals is strain path sensitive. In monotonic loading, the microstructure as well as the crystallographic texture evolve during deformation leading usually to a gradual material hardening that tends to saturate at large strains. Such evolution can be interrupted if a severe change of strain path occurs. The simplest way to change drastically the strain path is through reverse loading, namely, by loading the material in opposite direction to the previous one. In this case, the material behavior can show one or more characteristics, such as the Bauschinger effect, transient hardening, softening or hardening. This work investigated the effects of the prestrain on the mechanical response of the material subjected to reverse simple shear. The prestrain is produced by rolling, either symmetric or asymmetric, and different amounts of equivalent strain. Three routes of rolling are used, namely, symmetric, asymmetric continuous, and asymmetric reverse [1]. The Bauschinger effect slightly decreases with the prestrain increase for the initial material. After rolling, the Bauschinger effect is insensitive to the rolling route, and it is also insensitive to the amount of the rolling prestrain.
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LI, X. "Modeling and control of tribological properties for subsequent forming process in skin-pass rolling." In Material Forming. Materials Research Forum LLC, 2023. http://dx.doi.org/10.21741/9781644902479-226.

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Abstract. The surface roughness including average roughness (Ra) and peak number (RPc) after skin-pass rolling influences the strip’s product properties, such as its friction coefficient in the subsequent sheet metal forming process. In order to both ensure an optimal tribological behavior and fulfill the process requirements of the following forming steps, predefined roughness combinations of Ra and RPc should be attained in skin-pass rolling. In this work, a preliminary friction model relating friction and combination of Ra and RPc is determined using flat die drawing tests for DC04 steel. The model is validated by deep drawing tests and embedded in a roughness control system for skin-pass rolling. To show a proof of concept for independent control of tribological properties from strip thickness, a simulation framework is implemented in Matlab/Simulink. The results indicate that the friction coefficient can be controlled between 0.0924 and 0.1003 for the considered test scenario (which is) characterized by a normal pressure of 75kN and a relative speed of 10mm/s.
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Reports on the topic "Rolling (Metal-work)"

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Patchett, B. M., and A. C. Bicknell. L51706 Higher-Strength SMAW Filler Metals. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), December 1993. http://dx.doi.org/10.55274/r0010418.

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The welding of high strength steels in general, and for pipeline fabrication in particular, has shown that cracking due to hydrogen absorption during welding is more complex in these steels than in older, lower strength steels. In older steels, primary strengthening was accomplished with carbon, which caused hydrogen cracking in the base metal HAZ under reasonably predictable conditions involving microstructure, residual stress and hydrogen level. Pipeline steels were and are in the vanguard of change in strengthening philosophy. The change involves two areas of steel making, chemical composition and deformation processing. Pipeline steels now contain low carbon levels, in many cases less than 0.10%, and the resulting lack of strength is reclaimed by adding higher alloy levels to promote solution hardening (e.g. Mn), precipitation hardening (e.g. Cb, Cu) or transformation hardening (e.g. MO). In addition, alloy elements are added to improve toughness at high strength levels (e.g. Ni). At the same time, improvements have been made in reducing impurity and residual element levels, notably for S, P and O and N. Limitations on the effects of alloying additions on strength and toughness encouraged the use of deformation processing, primarily during rolling, to promote fine-grained microstructures to increase strength andtoughness simultaneously. Electrodes for the SMAW process have been developed for welding high-strength pipeline steels by using core wires made from high-strength microalloyed skelp extruded with cellulosic (Exx10) and low hydrogen (Exx16) flux coatings. The required alloy elements for high-strength deposits were therefore obtained from the core wire and not ferroalloy powders added to the flux, as is standard industrial practice. The idea behind this change was two fold: to avoid the possibility of introducing impurities from the varying sources of ferro alloy powders, including oxygen from the oxidized powder surfaces, and also to provide a closer match of the microalloy level to modern pipeline steel chemistries. The unknowns in this work were the effects of lower impurities/similar alloy content on the mechanical properties in the cast microstructure of a weld, compared to a pipe, and of the effect on electrode welding behaviour of a flux containing no ferro powders other than FeSi.
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