东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2011, Vol. 32 ›› Issue (10): 1402-1405+1409.DOI: -

• 论著 • 上一篇    下一篇

不同应变速率热变形双相不锈钢的取向特征

王佳夫;花福安;李建平;王国栋;   

  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:2013-06-19 修回日期:2013-06-19 发布日期:2013-04-04
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50971039);;

Orientation characteristics of hot deformed duplex stainless steel under different strain rate

Wang, Jia-Fu (1); Hua, Fu-An (1); Li, Jian-Ping (1); Wang, Guo-Dong (1)   

  1. (1) State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, China
  • Received:2013-06-19 Revised:2013-06-19 Published:2013-04-04
  • Contact: Wang, J.-F.
  • About author:-
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摘要： 在MMS-200热模拟实验机上,对S32750超级双相不锈钢在1 000℃,应变速率为0.01～10 s-1的条件下进行了高温压缩实验,利用电子背散射衍射(EBSD)技术对其晶体取向和晶界特征进行了分析.研究结果表明:在低应变速率时,铁素体晶粒出现〈111〉∥压缩轴织构;在高应变速率时,〈001〉织构又明显增加.铁素体晶粒随着应变速率的增加变得细小,而小角度晶界数量增加;在应变速率为10 s-1时,形变后奥氏体晶粒得到了〈110〉织构.应变速率的增加使奥氏体晶粒变大,小角度晶界数量增加.奥氏体相在小应变速率条件下变形可以获得更多的Σ3孪晶界.

关键词: 超级双相不锈钢, 电子背散射衍射, 取向, 晶界, 动态再结晶

Abstract: Under 1000°C and strain rate range of 0.01~10 s-1, the hot compression test of super duplex stainless steels S32750 was carried out with MMS-200 thermal-mechanical simulator. EBSD(electron backscattering diffraction) technique was applied to analyze grain orientation and grain boundary characters. The results showed that the <111> texture appears in ferrite under lower strain rate, and the additional <001> texture appears under higher strain rate. The ferrite grains become finer and the number of small angle grain boundaries increases with the increasing of strain rate. The <110> texture appears in the deformed austenite under the strain rate of 10 s-1. The austenite grain size and the number of small angle grain boundaries increase with the increasing of strain rate. A lot of Σ3 twin boundaries appear in the deformed austenite under lower strain rate.

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