新型低碳高合金轴承钢的热变形行为与热加工图

doi:10.13251/j.issn.0254-6051.2023.09.009

金属热处理 ›› 2023, Vol. 48 ›› Issue (9): 54-59.DOI: 10.13251/j.issn.0254-6051.2023.09.009

新型低碳高合金轴承钢的热变形行为与热加工图

武雪婷^1,2, 吴志伟^1,2, 张军^1,2

1.成都先进金属材料产业技术研究院股份有限公司, 四川成都 610300;
2.钒钛资源综合利用国家重点实验室, 四川攀枝花 617000

收稿日期:2023-04-18 修回日期:2023-07-27 出版日期:2023-09-25 发布日期:2023-10-25
通讯作者: 张军,研究员,博士,E-mail:jzhangj@mail.ustc.edu.cn
作者简介:武雪婷(1993—),女,副研究员,硕士,主要研究方向为高温轴承齿轮材料,E-mail:yjywuxt@pzhsteel.com.cn。

Hot deformation behavior and processing maps of a new type low-carbon high-alloy bearing steel

Wu Xueting^1,2, Wu Zhiwei^1,2, Zhang Jun^1,2

1. Chengdu Institute of Advanced Metallic Material Technology and Industry Co., Ltd., Chengdu Sichuan 610300, China;
2. State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization, Panzhihua Sichuan 617000, China

Received:2023-04-18 Revised:2023-07-27 Online:2023-09-25 Published:2023-10-25

摘要/Abstract

摘要： 利用Gleeble-3500热模拟试验机,在变形温度为900~1200 ℃,应变速率为0.01~1 s^-1,总变形量50%的条件下,对某新型低碳高合金轴承钢进行了高温单向热压缩试验。通过不同条件下的高温流变应力曲线分析了变形温度和应变速率对试验钢热变形力学行为的影响。以Arrhenius方程为本构模型,建立了低碳高合金轴承钢的高温本构方程,并基于Mutry失稳准则绘制了变形量为50%的热加工图。结果表明,低温低应变速率(900~1000 ℃、0.01~0.05 s^-1)时流变应力曲线具有动态回复特征。高温低应变(1050~1200 ℃、0.01~0.1 s^-1)速率下,材料在变形过程中发生动态再结晶。应变速率较高(1 s^-1)时,流变应力随应变增大而增大,曲线无显著的峰值应力。中高温中低应变速率(1050～1200 ℃、0.01~0.1 s^-1)下,能够得到均匀的完全动态再结晶组织,材料热加工性能最佳。

关键词: 高温轴承钢, 热变形行为, 本构方程, 热加工图

Abstract: High temperature unidirectional hot compression test of a new type low carbon and high alloy bearing steel was carried out by means of Gleeble-3500 thermal simulation machine under the conditions of deformation temperature of 900-1200 ℃, strain rate of 0.01-1 s^-1 and total deformation of 50%. The effect of the deformation temperature and strain rate on the mechanical behavior of the tested steel during hot deformation was analyzed through flow stress curves at high temperatures under different conditions. The Arrhenius equation was used as a constitutive model to develop the high-temperature constitutive equations for the tested steel, and the hot processing maps for the 50% deformation were drawn based on the Mutry instability criterion. The results show that the dynamic recovery characteristics of flow stress curves are obtained at low temperatures and small strain rates (900-1000 ℃, 0.01-0.05 s^-1), and dynamic recrystallization occurs at high temperatures and low strain rates (1050-1200 ℃, 0.01-0.1 s^-1) during deformation. At higher strain rate (1 s^-1), the flow stress increases with increasing strain, and the curves show no significant peak stress. At medium and high temperatures and low strain rates (1050-1200 ℃, 0.01-0.1 s^-1), the uniform fully dynamic recrystallized structure can be obtained, and the hot working performance of the material is the best.

Key words: heat resistant bearing steel, hot deformation behavior, constitutive equation, hot processing map

中图分类号:

TG142.1

武雪婷, 吴志伟, 张军. 新型低碳高合金轴承钢的热变形行为与热加工图[J]. 金属热处理, 2023, 48(9): 54-59.

Wu Xueting, Wu Zhiwei, Zhang Jun. Hot deformation behavior and processing maps of a new type low-carbon high-alloy bearing steel[J]. Heat Treatment of Metals, 2023, 48(9): 54-59.

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新型低碳高合金轴承钢的热变形行为与热加工图

Hot deformation behavior and processing maps of a new type low-carbon high-alloy bearing steel

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