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热变形过程中γ→α相变开始温度的预测——C-Mn钢与Nb-v微合金钢
引用本文:许云波,于永梅,刘相华,王国栋.热变形过程中γ→α相变开始温度的预测——C-Mn钢与Nb-v微合金钢[J].东北大学学报(自然科学版),2005,26(1):263-266.
作者姓名:许云波  于永梅  刘相华  王国栋
作者单位:东北大学,轧制技术及边轧自动化国家重点实验室,辽宁,沈阳,110004
基金项目:国家高技术研究发展计划(863计划),国家自然科学基金
摘    要:以Cahn理论和Scheil法则为基础,讨论了热变形过程对γ α相变的影响,预测了C Mn钢变形过程铁素体析出的开始温度Ar3d和Nb V钢连续冷却转变开始温度Ar3·结果表明,同样变形条件下,碳含量或锰含量越低的钢种Ar3d越高;同一成分钢种,随着变形量增大或变形速率降低Ar3d提高;随着冷却速率的增加,Ar3温度降低;变形可以提高Ar3温度·用该方法进行的计算机模拟结果和实验结果吻合良好,表明这种理论处理方法可用来模拟这种相变过程·

关 键 词:α相变  相变动力学  孕育期  形变诱导相变  连续冷却转变  
文章编号:1005-3026(2005)01-0059-04
修稿时间:2004年7月12日

Predicting the Onset of Austenite-Ferrite Transformation During Hot Deformation of Low Carbon and Nb-V Microalloyed Steels
XU Yun-bo,YU Yong-mei,LIU Xiang-hua,WANG Guo-dongty,Shenyang ,China..Predicting the Onset of Austenite-Ferrite Transformation During Hot Deformation of Low Carbon and Nb-V Microalloyed Steels[J].Journal of Northeastern University(Natural Science),2005,26(1):263-266.
Authors:XU Yun-bo  YU Yong-mei  LIU Xiang-hua  WANG Guo-dongty  Shenyang  China
Institution:XU Yun-bo,YU Yong-mei,LIU Xiang-hua,WANG Guo-dongty,Shenyang 110004,China. )
Abstract:The influence of hot deformation process on austenite-ferrite transformation was investigated to predict the starting temperature of ferrite precipitation of low carbon steels during deformation (A_(r3d)) and the starting transition temperature of Nb-V microalloyed steels during continuous cooling (A_(r3)). The results indicate that the lower the C or Mn content, the higher the A_(r3d) temperature under the same deformation conditions, and A_(r3d) increases with increasing strain amount or decreasing strain rate for the same steel grade. On the other hand, A_(r3) decreases with increasing cooling rate and increases due to deformation. The simulated results were found in agreement with experimental ones, which implied that such a theoretical approach can be used to model the transformation process above mentioned.
Keywords:ferrite transformation  transformation kinetics  incubation period  deformation induced ferrite transformation  continuous cooling transformation
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