东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2013, Vol. 34 ›› Issue (9): 1244-1247.DOI: -

• 材料与冶金 • 上一篇    下一篇

S38MnSiV非调质钢热变形行为及组织演变

赵阳，袁晓云，陈礼清，刘相华   

  1. (东北大学轧制技术及连轧自动化国家重点实验室，辽宁沈阳110819)
  • 收稿日期:2013-01-24 修回日期:2013-01-24 出版日期:2013-09-15 发布日期:2013-04-22
  • 通讯作者: 赵阳
  • 作者简介:赵阳(1981-)，男，辽宁辽阳人，东北大学博士后研究人员；陈礼清(1965-)，男，安徽安庆人，东北大学教授，博士生导师；刘相华(1953-)，男，黑龙江双鸭山人，东北大学教授，博士生导师.
  • 基金资助:
    国家高技术研究发展计划项目(2012AA03A508).

Hot Deformation Behavior and Microstructural Evolution of S38MnSiV Microalloyed Forging Steel

ZHAO Yang， YUAN Xiaoyun， CHEN Liqing， LIU Xianghua   

  1. State Key Laboratory of Rolling and Automation， Northeastern University， Shenyang 110819， China.
  • Received:2013-01-24 Revised:2013-01-24 Online:2013-09-15 Published:2013-04-22
  • Contact: ZHAO Yang
  • About author:-
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摘要： 利用MMS-300热模拟试验机开展单道次压缩实验和光学显微组织观察，研究了S38MnSiV非调质钢在温度为1173~1423K及应变速率为001~10s-1条件下的热变形行为，获得了应变速率和变形温度对该钢动态再结晶行为及组织的影响规律，按照双曲正弦方法确定了实验钢的热变形激活能和本构方程.结果表明:变形温度越高，应变速率越低，越有利于动态再结晶的发生；随着动态再结晶的进行，奥氏体平均晶粒尺寸随应变的增加逐渐减小；当应力达到稳态时，奥氏体晶粒尺寸不再随应变而发生变化.

关键词: 非调质钢, S38MnSiV, 热变形行为, 动态再结晶, 组织演变

Abstract: By conducting singlepass compression test in MMS300 thermomechanical simulator and optical microstructural observation， the hot deformation behavior of S38MnSiV microalloyed forging steel was investigated at temperature of 1173~1423K and strain rate of 001~10s-1. The effect law of strain rate and deformation temperature on dynamic recrystallization(DRX)behavior and microstructural evolution was gained， and the activation energy and the constitutive equation were established for hot deformation according to hyperbolic sine method. The results show that DRX is easier to occur at higher deformation temperature and lower strain rate. With the process of DRX， the average austenite grain size decreases with the increasing strain. When steady state stress is achieved， the austenite grain size remains almost the same，independent of the strain.

Key words: microalloyed forging steel, S38MnSiV, hot deformation behavior, dynamic recrystallization, microstructural evolution

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