Acta Metall Sin  2005, Vol. 41 Issue (6): 611-616     DOI:

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Influence of Deformation Temperature on the Microstructure Transformation in Medium Carbon Steel

HUI Weijun; TIAN Peng; DONG Han; SU Shihuai; YU Tongren; WENG Yuqing

Institute of Structural Materials; Central Iron & Steel Research Institute; Beijing 100081; Ma'anshan Iron & Steel Co. Ltd.; Ma'anshan 243000

HUI Weijun; TIAN Peng; DONG Han; SU Shihuai; YU Tongren; WENG Yuqing. Influence of Deformation Temperature on the Microstructure Transformation in Medium Carbon Steel. Acta Metall Sin, 2005, 41(6): 611-616 .

Abstract References Related Articles Recommended Metrics Download:  PDF(417KB)  Export:  BibTeX | EndNote (RIS)       Abstract  During uniaxial hot compression for a medium carbon steel, the deformation induced ferrite (DIF) appeared when deformed temperatures lower than A d3 (786 ℃). The volume fraction of DIF increases with decreasing deformation temperature, especially when deformed temperatures lower than 750 ℃ the volume fraction of DIF increases significantly, which is far beyond the equilibrium ferrite fraction of 54%. With the increase of DIF, more and more carbon atoms were rejected into the boundaries of ferrite and interfaces of ferrite/untransformed austenite. During isothermal holding below A1 (719 ℃) temperature just after deformation, supercooled austenite would decompose to different structures in three different ways: when the deformation temperature is higher than Ad3, conventional ferrite-lamellar pearlite structure was obtained; when the deformation temperature is lower than Ad3 whereas higher than Ar3 (645 ℃), retained austenite transformed to ferrite-lamellar or degenerated pearlite-grain boundary cementite; when the deformation temperature decreased to just above Ad3, a microstructure different from lamellar pearlite was obtained, which consisted of fine cementite particle and ferrite. Key words:  deformation temperature      medium carbon steel      microstructure evolution       Received:  15 September 2004      ZTFLH:  TG111     TG142   Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors HUI Weijun TIAN Peng DONG Han SU Shihuai YU Tongren WENG Yuqing URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y2005/V41/I6/611 [1]Weng Y Q.Iron Steel,2003;38(5):1 (翁宇庆．钢铁,2003;38(5);1) [2]Tsuji N.Tetsu Hagane,2002;88:359 (辻伸泰．铁之钢,2002;88:359) [3]Li W J,Wang G D,Liu X H.In:Workshop on New Generation Steel (NG Steel'2001),Beijing:The Chinese Society for Metals,2001:311 (李维娟,王国栋,刘相华．见:新一代钢铁材料研讨会,北京,中国金属学会,2001:311) [4]Tian Z X,Yang P,Sun Z Q.Trans Mater Heat Treat,2003;24(3):18 (田朝旭,杨平,孙祖庆．材料热处理学报,2003;24(3):18) [5]O'Brien J M,Hosford W F.Metall Mater Trans,2002;33A:1255 [6]Park J,Song D H,Lee D,Choo W Y.In:Zhu Y T,Lang-don T G,Mishra R S,Semiatin S L,Saran M J,Lowe T C,eds.,Ultrafine Grained Materials Ⅱ,Seattle:The Minerals,Metals & Materials Society,2002:275 [7]Storojeva L,Kaspar R,Ponge D.Mater Sci Forum,2003;426-432:1169 [8]Weng Y Q,et al.Ultrafine Grained Steels-The Theory of Microstructure Refinement and Controlling Technology for Steels.Beijing:Metallurgical Industry Press,2003:140,118 (翁宇庆,等．超细晶钢——钢的组织细化理论与控制技术．北京,冶金工业出版社,2003:140,118) [9]McQueen H J,Ryan N D.Mater Sci Eng,2002;A322:43 [10]An Y Z.Heat Treatment Technology.Beijing:China Machine Press,1982:51 (安运铮．热处理工艺学．北京:机械工业出版社,1982:51) [1] GONG Shengkai, LIU Yuan, GENG Lilun, RU Yi, ZHAO Wenyue, PEI Yanling, LI Shusuo. 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