20Cr2Ni4A钢的动态再结晶行为

doi:10.13251/j.issn.0254-6051.2024.10.030

金属热处理 ›› 2024, Vol. 49 ›› Issue (10): 179-184.DOI: 10.13251/j.issn.0254-6051.2024.10.030

20Cr2Ni4A钢的动态再结晶行为

吴晓东¹, 周少荣¹, 张肖佩佩¹, 王忠英²

1.江苏大学材料科学与工程学院, 江苏镇江 212013;
2.钢铁研究总院华东分院, 江苏淮安 223000

收稿日期:2024-05-07 修回日期:2024-08-14 出版日期:2024-11-28 发布日期:2024-11-28
作者简介:吴晓东(1969—),男,副教授,博士,主要研究方向为冶金工艺与材料性能,E-mail: wuxd@ujs.edu.cn
基金资助:
国家重点研发计划(2020YFB2008100)

Dynamic recrystallization behavior of 20Cr2Ni4A steel

Wu Xiaodong¹, Zhou Shaorong¹, Zhang Xiaopeipei¹, Wang Zhongying²

1. School of Materials Science and Engineering, Jiangsu University, Zhenjiang Jiangsu 212013, China;
2. East China Branch of CISRI, Huaian Jiangsu 223000, China

Received:2024-05-07 Revised:2024-08-14 Online:2024-11-28 Published:2024-11-28

摘要/Abstract

摘要： 利用Gleeble-3500热模拟试验机对20Cr2Ni4A渗碳齿轮用钢进行应变量为0.8、变形温度为800~1050 ℃、应变速率为0.01~5 s^-1下的单道次等温压缩试验,研究其在试验条件下的动态再结晶行为。根据试验结果绘制流变应力曲线。结果表明:流变应力曲线根据不同变形条件下加工硬化、动态回复和动态再结晶三者的进行程度可分为动态回复型和动态再结晶型,在低应变速率下(0.01~0.1 s^-1),950~1050 ℃发生较明显的动态再结晶;利用加工硬化率确定了动态再结晶临界应变ε_c和峰值应变ε_p,构建了ε_c与ε_p的关系模型;根据试验数据建立动态再结晶动力学模型,并结合显微组织分析说明该模型具有一定可靠性。

关键词: 20Cr2Ni4A钢, 热变形, 临界应变, 动态再结晶, 体积分数

Abstract: Dynamic recrystallization behavior of 20Cr2Ni4A carburized steel for gears was studied by means of single isothermal compression test with deformation temperature of 800-1050 ℃ and strain rate of 0.01-5 s^-1 at the strain variable of 0.8 on Gleeble-3500 thermal simulation machine. According to the experimental results, the flow stress curve was drawn. The results show that the flow stress curve can be divided into dynamic recovery type and dynamic recrystallization type according to the degree of work hardening, dynamic recovery and dynamic recrystallization under different deformation conditions. At low strain rate (0.01-0.1 s^-1), the dynamic recrystallization occurs more obviously at 950-1050 ℃. The critical strain ε_c and peak strain ε_p of dynamic recrystallization are determined by the work hardening rate, and the relationship model between ε_c and ε_p is established. Based on the experimental data, a dynamic model of dynamic recrystallization is established, and the analysis of microstructure shows that the model is reliable.

Key words: 20Cr2Ni4A steel, thermal deformation, critical strain, dynamic recrystallization, volume fraction

中图分类号:

TG142.1

吴晓东, 周少荣, 张肖佩佩, 王忠英. 20Cr2Ni4A钢的动态再结晶行为[J]. 金属热处理, 2024, 49(10): 179-184.

Wu Xiaodong, Zhou Shaorong, Zhang Xiaopeipei, Wang Zhongying. Dynamic recrystallization behavior of 20Cr2Ni4A steel[J]. Heat Treatment of Metals, 2024, 49(10): 179-184.

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20Cr2Ni4A钢的动态再结晶行为

Dynamic recrystallization behavior of 20Cr2Ni4A steel

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