2507超级双相不锈钢的流变应力本构关系及热加工图

doi:10.13251/j.issn.0254-6051.2022.01.016

金属热处理 ›› 2022, Vol. 47 ›› Issue (1): 94-99.DOI: 10.13251/j.issn.0254-6051.2022.01.016

2507超级双相不锈钢的流变应力本构关系及热加工图

何婵¹, 邹德宁¹, 赵洁¹, 陈兴润², 钱张信²

1.西安建筑科技大学冶金工程学院, 陕西西安 710055;
2.酒钢集团宏兴钢铁股份有限公司, 甘肃嘉峪关 735100

收稿日期:2021-10-05 修回日期:2021-12-05 出版日期:2022-01-25 发布日期:2022-02-18
通讯作者: 邹德宁,教授,E-mail:zoudening@sina.com
作者简介:何婵(1996—),女,硕士研究生,主要研究方向为双相不锈钢热变形行为,E-mail:1092160823@qq.com。
基金资助:
国家自然科学基金(51774226);山西省科技重大专项(20181101016, 20191102006)

Flow stress constitutive relationship and processing map of super duplex stainless steel 2507

He Chan¹, Zou Dening¹, Zhao Jie¹, Chen Xingrun², Qian Zhangxin²

1. School of Metallurgical Engineering, Xi'an University of Architecture and Technology, Xi'an Shaanxi 710055, China;
2. Hongxing Iron and Steel Co., Ltd., Jiuquan Iron and Steeel Group Corporation, Jiayuguan Gansu 735100, China

Received:2021-10-05 Revised:2021-12-05 Online:2022-01-25 Published:2022-02-18

摘要/Abstract

摘要： 采用Gleeble-3800热模拟试验机研究了热变形温度为950~1200 ℃、应变速率为 0.01~10 s^-1条件下2507超级双相不锈钢的热压缩变形行为,并借助光学显微镜观察了不同变形过程中的微观组织演化。基于试验数据分析,建立2507超级双相不锈钢的流变应力本构关系及热加工图。结果表明:流变应力随着变形温度的升高和应变速率的降低而逐渐降低,在高应变速率下,流变曲线出现“类屈服平台”。试验钢的热变形激活能为414.57 kJ·mol^-1,应力指数为4.18,峰值应力本构方程为ε·=3.69×10¹⁵[sinh(0.0101σ)]^4.18exp-414.57RT,根据微观组织分析及热加工图确定出试验钢的最佳热加工区域为热压缩温度1060~1120 ℃,应变速率0.01~0.1 s^-1。

关键词: 2507超级双相不锈钢, 热变形, 本构方程, 热加工图

Abstract: Hot deformation behavior of super duplex stainless steel 2507 was investigated by using Gleeble-3800 thermal simulation testing machine under the conditions of hot deformation temperature of 950-1200 ℃ and strain rate of 0.01-10 s^-1. And the microstructure evolution in different deformation processes was observed with the help of optical microscope. Based on the experimental data analysis, the flow stress constitutive relationship and processing maps of the super duplex stainless steel 2507 were established. The results show that the flow stress gradually decreases with the increase of deformation temperature and the decrease of strain rate, and the rheological curves appear as “yield-like platform” at a high strain rate. The activation energy of hot deformation and the stress index of the steel are 414.57 kJ·mol^-1 and 5.18, respectively. The peak stress constitutive equation is ε·=3.69×10¹⁵[sinh(0.0101σ)]^4.18exp-414.57RT. According to the microstructure analysis and processing maps, the optimized process range of the steel is the deformation temperature of 1060-1120 ℃ and the strain rate of 0.01-0.1 s^-1.

Key words: super duplex stainless steel 2507, hot deformation, constitutive equation, processing map

中图分类号:

TG142.71

何婵, 邹德宁, 赵洁, 陈兴润, 钱张信. 2507超级双相不锈钢的流变应力本构关系及热加工图[J]. 金属热处理, 2022, 47(1): 94-99.

He Chan, Zou Dening, Zhao Jie, Chen Xingrun, Qian Zhangxin. Flow stress constitutive relationship and processing map of super duplex stainless steel 2507[J]. Heat Treatment of Metals, 2022, 47(1): 94-99.

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2507超级双相不锈钢的流变应力本构关系及热加工图

Flow stress constitutive relationship and processing map of super duplex stainless steel 2507

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