奥氏体逆相变退火温度对含铜中锰钢组织和性能的影响

doi:10.13251/j.issn.0254-6051.2025.02.015

金属热处理 ›› 2025, Vol. 50 ›› Issue (2): 96-101.DOI: 10.13251/j.issn.0254-6051.2025.02.015

奥氏体逆相变退火温度对含铜中锰钢组织和性能的影响

张盛豪^1,2, 王宝^1,2, 李思佳^1,2, 肖美美^1,2, 周建安^1,2

1.武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室, 湖北武汉 430081;
2.武汉科技大学钢铁冶金新工艺湖北省重点实验室, 湖北武汉 430081

收稿日期:2024-08-15 修回日期:2024-12-04 发布日期:2025-04-10
通讯作者: 王宝,副教授,博士,E-mail:wangbao1983@wust.edu.cn
作者简介:张盛豪(1998—),男,硕士研究生,主要研究方向为中锰钢的热处理,E-mail:gaosqflying@163.com。
基金资助:
钢铁冶金及资源利用省部共建教育部重点实验室基金(FMRUlab202318)

Influence of austenite reverse transformation annealing temperature on microstructure and properties of Cu-containing medium manganese steel

Zhang Shenghao^1,2, Wang Bao^1,2, Li Sijia^1,2, Xiao Meimei^1,2, Zhou Jian'an^1,2

1. The Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan Hubei 430081, China;
2. Hubei Provincial Key Laboratory for Advanced Ironmaking and Steelmaking Processes, Wuhan University of Science and Technology, Wuhan Hubei 430081, China

Received:2024-08-15 Revised:2024-12-04 Published:2025-04-10

摘要/Abstract

摘要： 采用扫描电镜、EBSD、X射线衍射仪以及透射电镜研究了奥氏体逆相变退火温度对0.30C-5.21Mn-0.34Cu中锰钢微观组织演变、力学性能和变形行为的影响。结果表明,试验钢退火后主要的室温组织为残留奥氏体、铁素体和马氏体,随着退火温度的升高,残留奥氏体的含量先增大后急剧下降,700 ℃时最高为20.38%。随着退火温度的升高,试验钢的抗拉强度和屈服强度呈现相反的变化规律;而伸长率和强塑积先增加后降低,和残留奥氏体体积分数的变化规律基本一致。试验钢在700 ℃退火60 min后,综合力学性能最优,抗拉强度、伸长率和强塑积分别达到1004 MPa、54.80%和55.02 GPa·%。

关键词: 含铜中锰钢, 奥氏体逆相变退火, 组织演变, 残留奥氏体, 加工硬化

Abstract: Influence of austenite reverse transformation annealing temperature on microstructure evolution, mechanical properties and deformation behavior of 0.30C-5.21Mn-0.34Cu medium manganese steel was studied by means of SEM, EBSD, XRD and TEM. The results show that the microstructure of the steel after annealing is mainly composed of ferrite, retained austenite and martensite. As the annealing temperature increases, the content of retained austenite first increases and then sharply decreases, reaching a maximum of 20.38% at 700 ℃. As the annealing temperature increases, the tensile strength and yield strength of the tested steel show opposite changes. While the elongation and product of strength and elongation first increase and then decrease, which is basically consistent with the variation law of retained austenite volume fraction. When annealed at 700 ℃ for 60 min, the comprehensive mechanical properties of the tested steel are the best, with tensile strength, elongation, and product of strength and elongation reaching 1004 MPa, 54.80%, and 55.02 GPa·%, respectively.

Key words: medium manganese steel containing copper, austenite reverse transformation annealing, microstructure evolution, retained austenite, work hardening

中图分类号:

TG441.8

张盛豪, 王宝, 李思佳, 肖美美, 周建安. 奥氏体逆相变退火温度对含铜中锰钢组织和性能的影响[J]. 金属热处理, 2025, 50(2): 96-101.

Zhang Shenghao, Wang Bao, Li Sijia, Xiao Meimei, Zhou Jian'an. Influence of austenite reverse transformation annealing temperature on microstructure and properties of Cu-containing medium manganese steel[J]. Heat Treatment of Metals, 2025, 50(2): 96-101.

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奥氏体逆相变退火温度对含铜中锰钢组织和性能的影响

Influence of austenite reverse transformation annealing temperature on microstructure and properties of Cu-containing medium manganese steel

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