东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2009, Vol. 30 ›› Issue (8): 1124-1126.DOI: -

• 论著 • 上一篇    下一篇

双相不锈钢热变形行为研究

方轶琉;程逸明;王月香;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;
  • 收稿日期:2013-06-22 修回日期:2013-06-22 出版日期:2009-08-15 发布日期:2013-06-22
  • 通讯作者: Fang, Y.-L.
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50734002)

Hot deformation behavior of duplex stainless steels

Fang, Yi-Liu (1); Cheng, Yi-Ming (1); Wang, Yue-Xiang (1); Liu, Zhen-Yu (1)   

  1. (1) State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110004, China
  • Received:2013-06-22 Revised:2013-06-22 Online:2009-08-15 Published:2013-06-22
  • Contact: Fang, Y.-L.
  • About author:-
  • Supported by:
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摘要： 采用高温压缩实验方法研究了两种不同氮含量双相不锈钢00Cr22Ni5Mo3N和00Cr22Ni1Mo0.7N在1 000~1 200℃温度范围内、应变速率为0.01~30 s-1条件下的热变形行为.根据实验数据构建了两种双相不锈钢的热变形方程,两种双相不锈钢的形变激活能分别为534 kJ/mol和482 kJ/mol.通过对微观组织的观察和分析,确定了较高温度且较低应变速率区域为优化的热加工区域.在该优化的热加工区域进行变形时,奥氏体和铁素体发生充分的动态再结晶和动态回复;而在较低温度、较高应变速率区域进行变形时,微观组织呈现强烈的局部流变,甚至可以观察到裂纹.

关键词: 高温压缩实验, 双相不锈钢, 热变形, 微观组织

Abstract: The hot deformation behavior of the austenite-ferrite duplex stainless steels 00Cr22Ni5Mo3N and 00Cr22Ni1Mo0.7N were investigated experimentally in the temperature range from 1000 to 1200°C and at the strain rates from 0.01 to 30 s-1 by hot compression tests. With the experimental data, two relevant equations of hot deformation were given, where the activation energy was 534 kJ/mol and 482 kJ/mol, respectively. It was found that the optimum regions for hot working are of comparatively high temperature and low strain rate, where the fully dynamic recrystallization/recovery of austenite and ferrite come to pass during hot deformation, while in the regions of comparatively low temperature and high strain rate, the microstructure exhibits intense flow localization, even cracks observable during deformation.

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