机械工程学报 >

2017 , Vol. 53 >Issue 22: 74 - 80

DOI: https://doi.org/10.3901/JME.2017.22.074

材料科学与工程

0Cr17Mn17Mo3NiN奥氏体不锈钢的热变形行为及热加工图

  • 卓秀秀 ,
  • 徐桂芳 ,
  • 袁圆 ,
  • 罗锐 ,
  • 程晓农
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  • 江苏大学材料科学与工程学院 镇江 212013
卓秀秀,女,1991年出生。主要研究方向为金属材料的加工与组织分析。E-mail:zhuo_show@163.com

收稿日期: 2016-09-18

  修回日期: 2017-05-13

  网络出版日期: 2017-11-20

基金资助

江苏省产学研联合创新基金——前瞻性联合研究基金资助项目（BY2012169）。

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Hot Deformation Behavior and Processing Map of 0Cr17Mn17Mo3NiN Austenitic Stainless Steel

  • ZHUO Xiuxiu ,
  • XU Guifang ,
  • YUAN Yuan ,
  • LUO Rui ,
  • CHENG Xiaonong
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  • School of Materials and Engineering, Jiangsu University, Zhenjiang 212013

Received date: 2016-09-18

  Revised date: 2017-05-13

  Online published: 2017-11-20

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摘要

采用Gleeble-3500热模拟试验机研究0Cr17Mn17Mo3NiN奥氏体不锈钢在950~1 100℃，0.01~1 s-1条件下的热变形行为。依据热压缩过程中0Cr17Mn17Mo3NiN奥氏体不锈钢的真应变-真应力曲线，确定了其在该热变形参数下的高温本构方程，并根据动态材料模型建立热加工图。结果表明，在相同的应变速率下，流变应力随着温度的升高而降低；而在相同的变形温度下，流变应力随着应变速率的减小而降低。0Cr17Mn17Mo3NiN奥氏体不锈钢的热变形激活能为549 kJ/mol。在980~1 050℃范围内，真应变为0.4，应变速率为0.01~0.1 s-1时，能量耗散效率η值为0.28~0.3，0Cr17Mn17Mo3NiN奥氏体不锈钢容易发生动态再结晶。因此，该温度区域是最优的热加工工艺窗口。

关键词： 0Cr17Mn17Mo3NiN奥氏体不锈钢; 热变形; 高温本构方程; 热加工图

本文引用格式

卓秀秀 , 徐桂芳 , 袁圆 , 罗锐 , 程晓农 . 0Cr17Mn17Mo3NiN奥氏体不锈钢的热变形行为及热加工图[J]. 机械工程学报, 2017 , 53(22) : 74 -80 . DOI: 10.3901/JME.2017.22.074

Abstract

The hot deformation behavior of 0Cr17Mn17Mo3NiN austenitic stainless steel is investigated by Gleeble-3500 in the temperatures range of 950-1 100℃ and strain rates range of 0.01-1 s-1. The constitutive equation of this stainless steel under hot deformation is determined according to the true strain-true stress curves. The processing map is established on the basis of the dynamic material model (DMM). The results show that the flow stress decreases with the increase of the temperature at the same strain rate; however, the flow stress decreases with decrease of the strain rate at the same temperature. The activation energy of hot deformation for the austenitic stainless steel is 549 kJ/mol. The energy dissipation efficiency is 0.28-0.3 in the temperature of 980-1 050℃, when the true strain is 0.4 and the the strain rate is 0.01-0.1 s-1. The optimized hot deformation processing window of the austenitic stainless steel is identified as 980-1 050℃, 0.01-0.1 s-1, in which the dynamic recrystallization in the stainless steel is easily occurred.

Key words： 0Cr17Mn17Mo3NiN austenitic stainless steel; hot deformation; hot deformation constitutive equation; processing map

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