Q-P工艺等温淬火温度对60Mn2SiCr钢组织和力学性能的影响

doi:10.13251/j.issn.0254-6051.2023.05.041

金属热处理 ›› 2023, Vol. 48 ›› Issue (5): 265-269.DOI: 10.13251/j.issn.0254-6051.2023.05.041

Q-P工艺等温淬火温度对60Mn2SiCr钢组织和力学性能的影响

王彬, 王浩祥, 汪军, 王常志, 段东, 唐拔明, 王栋栋, 胡云杰

铜陵有色金神耐磨材料有限责任公司, 安徽铜陵 244000

收稿日期:2022-11-08 修回日期:2023-03-22 出版日期:2023-05-25 发布日期:2023-06-21
通讯作者: 汪军,正高级工程师,E-mail: 248567470@qq.com
作者简介:王彬(1994—),男,助理工程师,硕士,主要研究方向为金属凝固、金属热处理工艺,E-mail: 1670797249@qq.com。
基金资助:
安徽省科技重大专项(202103a05020002)

Effect of isothermal quenching temperature in Q-P process on microstructure and mechanical properties of 60Mn2SiCr steel

Wang Bin, Wang Haoxiang, Wang Jun, Wang Changzhi, Duan Dong, Tang Baming, Wang Dongdong, Hu Yunjie

Tongling Non-ferrous Jinshen Wear-resistant Materials Co., Ltd., Tongling Anhui 244000, China

Received:2022-11-08 Revised:2023-03-22 Online:2023-05-25 Published:2023-06-21

摘要/Abstract

摘要： 利用扫描电镜、X射线衍射仪、冲击试验机、洛氏硬度计和拉伸试验机等,对淬火-配分(Q-P)工艺等温淬火温度对60Mn2SiCr钢微观组织及力学性能的影响进行了研究,并重点分析了试验钢经Q-P处理后微观组织中残留奥氏体含量及残留奥氏体中碳含量与力学性能的关系。结果表明,等温淬火温度从120 ℃升高至180 ℃,试样洛氏硬度、冲击吸收能量、抗拉强度以及伸长率均随着马氏体、残留奥氏体及残留奥氏体中碳含量下降而降低。当Q-P工艺等温淬火温度为120 ℃时,力学性能最优,试样中残留奥氏体体积分数为13.9%,残留奥氏体中碳含量(质量分数)为1.1%,洛氏硬度为58.8 HRC,冲击吸收能量为50.7 J,抗拉强度为1768 MPa,伸长率达19.6%。

关键词: Q-P工艺, 60Mn2SiCr钢, 等温淬火温度, 组织, 性能

Abstract: Effect of isothermal quenching temperature during quenching and partitioning (Q-P) process on microstructure and mechanical properties of 60Mn2SiCr steel was studied by means of scanning electron microscope, X-ray diffractometer, impact testing machine, Rockwell hardness tester and tensile testing machine. The relationship between the retained austenite content in the microstructure and the carbon content in the retained austenite of the tested steel after Q-P treatment and the mechanical properties was emphatically analyzed. The results show that when the isothermal quenching temperature increases from 120 ℃ to 180 ℃, the Rockwell hardness, impact absorbed energy, tensile strength and elongation of the specimen decrease with the decrease of content of martensite and retained austenite and carbon content in retained austenite. When the isothermal quenching temperature in Q-P process is 120 ℃, the mechanical properties are optimal, with volume fraction of retained austenite of 13.9%, the carbon content (mass fraction) in the retained austenite of 1.1%, the Rockwell hardness of 58.8 HRC, the impact absorbed energy of 50.7 J, the tensile strength of 1768 MPa and the elongation of 19.6%.

Key words: Q-P process, 60Mn2SiCr steel, isothermal quenching temperature, microstructure, properties

中图分类号:

王彬, 王浩祥, 汪军, 王常志, 段东, 唐拔明, 王栋栋, 胡云杰. Q-P工艺等温淬火温度对60Mn2SiCr钢组织和力学性能的影响[J]. 金属热处理, 2023, 48(5): 265-269.

Wang Bin, Wang Haoxiang, Wang Jun, Wang Changzhi, Duan Dong, Tang Baming, Wang Dongdong, Hu Yunjie. Effect of isothermal quenching temperature in Q-P process on microstructure and mechanical properties of 60Mn2SiCr steel[J]. Heat Treatment of Metals, 2023, 48(5): 265-269.

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Q-P工艺等温淬火温度对60Mn2SiCr钢组织和力学性能的影响

Effect of isothermal quenching temperature in Q-P process on microstructure and mechanical properties of 60Mn2SiCr steel

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