东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2012, Vol. 33 ›› Issue (10): 1419-1423.DOI: -

• 论著 • 上一篇    下一篇

20Mn2SiV非调质钢热变形流变应力模型

赵阳;陈礼清;杨福平;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;中国第一汽车集团公司技术中心;
  • 收稿日期:2013-06-19 修回日期:2013-06-19 出版日期:2012-10-15 发布日期:2013-04-04
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    中央高校基本科研业务费专项资金资助项目(N100507003);;

Flow stress model of 20Mn2SiV micro-alloyed forging steel during hot deformation

Zhao, Yang (1); Chen, Li-Qing (1); Yang, Fu-Ping (2); Liu, Xiang-Hua (1)   

  1. (1) State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, China; (2) R and D Center, FAW Group Corporation, Changchun 130011, China
  • Received:2013-06-19 Revised:2013-06-19 Online:2012-10-15 Published:2013-04-04
  • Contact: Zhao, Y.
  • About author:-
  • Supported by:
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摘要： 利用MMS-300热模拟试验机,对20Mn2SiV非调质钢在变形温度为900~1 100℃及应变速率为0.01~10s-1条件下的流变应力进行了研究,讨论了Z参数与动态再结晶之间的关系,并建立了该钢的热变形流变应力模型.结果表明:采用Z参数可以判断动态再结晶发生与否,当lnZ≤32.76时,20Mn2SiV非调质钢发生动态再结晶;根据动态再结晶发生与否以及应变是否达到动态再结晶临界应变值,分别建立了不同情况下的流变应力模型,模型拟合效果良好.

关键词: 非调质钢, 20Mn2SiV, 热变形, 动态再结晶, 流变应力模型

Abstract: The flow stress of 20Mn2SiV micro-alloyed forging steel was investigated by MMS-300 thermo-mechanical simulator at the deformation temperature of 900~1100°C and the strain rates ranging from 0.01 to 10 s-1. The relationship between Z parameter and dynamic recrystallization was discussed. A flow stress model of the steel was developed during hot deformation. The results showed that the occurrence of dynamic recrystallization can be judged by Z parameter. When lnZ is less than or equal to 32.76, the dynamic recrystallization takes place. The flow stress models were established, respectively, according to whether the dynamic recrystallization occurs or the strain is higher than the critical strain or not. The models show a good fitting precision.

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