ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2012, Vol. 33 ›› Issue (6): 59-62.

• 组织和性能 • 上一篇    

321奥氏体不锈钢动态再结晶的研究

胡伟华,康永林,唐兴昌   

  1. 北京科技大学材料科学与工程学院,北京100083
  • 收稿日期:2012-05-23 出版日期:2012-12-01 发布日期:2022-09-30
  • 作者简介:胡伟华(1986-),男,硕士研究生,不锈钢的产品开发及工艺控制研究。

A Study on Dynamic Recrystallization of Austenite Stainless Steel 321

Hu Weihua, Kang Yonglin,Tang Xingchang   

  1. School of Materials Science and Engineering, University of Science and Technology, Beijing 100083
  • Received:2012-05-23 Published:2012-12-01 Online:2022-09-30

摘要: 通过Gleeble-1500热模拟试验机研究了321钢(/%:0.028C、0.69Si、1.21Mn、0.030P、0.001S、17.33Cr、9.19Ni、0.31Ti)单道次高温(900~1 200℃)压缩(0.01~1 s-1)时的动态再结晶。结果表明,变形温度越高,应变速率越低,321钢的软化作用越强,热变形条件下的真应力-真应变曲线一般没有明显的应力峰值,在应变速率0.01、0.1、1 s-1时321钢动态再结晶开始发生的温度分别为1 050、1 150、1 150℃;在1 200℃变形时,仍然只发生部分动态再结晶。321钢热变形激活能Q=422.72 kJ/mol,动态再结晶Z参数Z=εexp[422 720/(RT)],临界应变εc=0.035 67Z0.066 04

关键词: 321奥氏体不锈钢, 动态再结晶, 热模拟

Abstract: The dynamic recrystallization of steel 321 (/% : 0. 028C, 0. 69Si, 1. 21Mn, 0. 030P, 0. 001S, 17. 33Cr, 9. 19Ni, 0. 31Ti) has been studied by single pass hot compression with 0. 01 ~ 1 s-1 at 900 ~ 1 200 ℃ oh a Gleeble-1500 thermal simulation machine. Results show that with higher deformation temperature and lower strain rate, the softening effect of steel 321 is stronger; generally there is no obvious peak stress at hot deformation true stress-true strain curves ; with strain rate 0. 01, 0. 1 and Is-1, the temperature of initial dynamic recrystallization for steel 321 is respectively 1 050 °C , 1 150 ℃ and 1 150 ℃,and as deforming at 1 200, the partial dynamic recrystallization only occurs in steel. The activation energy Q for dynamic recrystallization in hot deformation process of steel 321 is 422. 72 kJ/mol, the dynamic recrystallization Z parameter is εexp[422 720/ (RT) ] and critical strain εc =0.035 67Z0.066 04.