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 ›› 2014, Vol. 35 ›› Issue (6): 54-56.

• 组织和性能 • 上一篇    下一篇

316LN高氮超低碳奥氏体不锈钢的热变形行为和组织演变

裴海祥1,2,曾莉2,3,王立新2,3,张海龙1,王西涛1   

  1. 1北京科技大学新金属材料国家重点实验室,北京100083;
    2山西太钢不锈钢股份有限公司技术中心;
    3先进不锈钢材料国家重点实验室,太原030003
  • 收稿日期:2014-06-20 出版日期:2014-12-01 发布日期:2022-08-20
  • 通讯作者: 王西涛
  • 作者简介:裴海祥(1972-),男,博士生(北京科技大学),高级工程师, 1994年兰州大学(本科)毕业,钢铁组织与性能研究。
  • 基金资助:
    国家863计划项目资助(2012AA03A507)

Hot Deformation Behavior and Structure Evolution of High Nitrogen Ultra-Low-Carbon Austenite Stainless Steel 316LN

Pei Haixiang1,2 , Zeng Li2,3, Wang Lixin2,3, Zhang Hailong1 , Wang Xitao1   

  1. 1 State Key Laboratory for Advanced Metals and Materials, University of Science and Technology, Beijing 100083 ;
    2 Technical Center,
    3 State Key Laboratory of Advanced Stainless Steel Materials,Taiyuan Iron and Steel Co Ltd, Taiyuan 030003
  • Received:2014-06-20 Published:2014-12-01 Online:2022-08-20

摘要: 试验的316LN钢(/%:0.011C,0.49Si,1.52Mn,0.016P,0.001S,16.65Cr,13.43Ni,2.18Mo,0.153N)为7.2 t铸锭初轧开坯并锻造成的Φ180 mm圆钢。利用Gleeble-3800热模拟试验机研究了316LN钢在应变速率0.1~50 s-1、1050~1200℃时的热变形行为和组织演变规律,并通过线性回归分析建立了316LN钢的本构方程。结果表明,变形温度升高有利于动态再结晶的形核,并在热变形过程中促进动态再结晶扩展;热变形过程材料常数α为0.0061,应力指数n为5.5436,表观激活能550.512 kJ/mol,动态再结晶晶粒数量随着变形温度的增加而增多,到1 200℃变形时发生了完全的动态再结晶。

关键词: 316LN高氮超低碳奥氏体不锈钢, 热变形, 本构方程, 动态再结晶

Abstract: The test steel 316LN (/% : 0.011C, 0.49Si, 1.52Mn, 0.016P, 0.001S, 16.65Cr, 13.43Ni, 2.18Mo, 0. 153N) is Φ 180 mm round bar forged and primary-rolled from 7. 2 t ingot. The hot deformation behavior and structure evolution rule of steel 316LN with strain rate 0. 1 ~ 50 s-1 at 1 050 ~ 1 200 ℃ has been studied by using thermal-simulated test machine Gleeble-3800, and a constitutive equation of steel 316LN is established by linear regression analysis. Results show that increase of deformation temperature is favorable for nucleation of dynamic recrystallization and promoting the development of dynamic recrystallization during hot deformation; in hot deformation process the material constant α is 0.006 1, the stress exponent n is 5.543 6 and the apparent activation energy is 550. 512 kJ/mol; with increasing deformation temperature the number of dynamic recrystallized grains in steel increases, and the complete dynamic recrystallization occurs in steel deformed at 1 200 ℃.

Key words: Index High Nitrogen Ultra-Low-Carbon Austenite Stainless Steel 316LN, Hot Deformation, Constitutive Equation, Dynamic Recrystallization