东北大学学报:自然科学版 ›› 2016, Vol. 37 ›› Issue (5): 638-642.DOI: 10.12068/j.issn.1005-3026.2016.05.007

• 材料与冶金 • 上一篇    下一篇

低碳、Ti-V复合微合金化钢的流变应力模型

沈继程, 贾涛, 刘振宇   

  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:2015-04-07 修回日期:2015-04-07 出版日期:2016-05-15 发布日期:2016-05-13
  • 通讯作者: 沈继程
  • 作者简介:沈继程(1981-),男,山东临沂人,东北大学博士研究生; 刘振宇(1967-),男,内蒙古赤峰人,东北大学教授,博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51204048); 辽宁省教育厅科学研究一般项目(L2013112).

Flow Stress Modeling in Low Carbon Titanium-Vanadium Microalloyed Steel

SHEN Ji-cheng, JIA Tao, LIU Zhen-yu   

  1. State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, China.
  • Received:2015-04-07 Revised:2015-04-07 Online:2016-05-15 Published:2016-05-13
  • Contact: JIA Tao
  • About author:-
  • Supported by:
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摘要: 通过单道次压缩实验,研究了一种低碳、Ti-V复合微合金化钢在温度为1173~1373K及应变速率为0.1~10s-1条件下的奥氏体应力-应变行为;基于Akben等对溶质阻碍动态再结晶的量化研究工作,获得了本实验钢的近似的形变激活能Q○def及Zener-Hollomon参数;采用Jonas等的分析方法,计算得到回复参数r和r’、屈服应力σ0、饱和流变应力σ○sat和动态再结晶临界应力σc与Z参数的关系;获得了动态再结晶动力学,并最终建立流变应力数学模型.

关键词: 钛钒微合金钢, 动态再结晶, 流变应力, 数学模型, 单道次压缩

Abstract: Using the single-pass compression experiment, the stress-strain behavior of austenite in a low carbon titanium-vanadium microalloyed steel was studied. The investigated temperature and strain rate were in a range of 1 173~1 373K and 0.1~10s-1, respectively. The deformation activation energy Qdef and Zener-Hollomon parameter were determined according to Akben’s work which quantified the drag effect of solutes on the dynamic recrystallization. Based on Jonas’ analysis, the recovery parameters r and r’, yield stress σ0, saturation stress σsat, and the critical stress for dynamic recrystallization σc were formulated as functions of Z-parameter and then the kinetics for dynamic recrystallization was derived. Eventually, a flow stress model was established.

Key words: titanium-vanadium microalloyed steel, dynamic recrystallization, flow stress, mathematical model, single-pass compression

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