淬火温度对Cr5MoVNi钢组织和性能的影响

doi:10.13251/j.issn.0254-6051.2022.09.022

金属热处理 ›› 2022, Vol. 47 ›› Issue (9): 125-129.DOI: 10.13251/j.issn.0254-6051.2022.09.022

淬火温度对Cr5MoVNi钢组织和性能的影响

王世凯¹, 王睿², 康燕², 于志强², 闫志杰²

1.山西煤矿机械制造股份有限公司, 山西太原 030031;
2.中北大学材料科学与工程学院, 山西太原 030051

收稿日期:2022-04-02 修回日期:2022-08-03 发布日期:2022-10-18
通讯作者: 闫志杰,教授,博士,E-mail: zjyan@nuc.edu.cn
作者简介:王世凯(1970—),男,高级工程师,学士,主要研究方向为煤机新材料,E-mail: 035100028344@189.cn。
基金资助:
国家自然科学基金(52071300,51904278);中央引导地方科技发展专项(YDZX20191400004587,YDZJSX2021B020,YDZJSX2021C007);浙江省重大科技专项(2020C01131);山西省自然科学基金(201801D121105)

Effect of quenching temperature on microstructure and properties of Cr5MoVNi steel

Wang Shikai¹, Wang Rui², Kang Yan², Yu Zhiqiang², Yan Zhijie²

1. Shanxi Coal Mine Machinery Manufacturing Co. , Ltd. , Taiyuan Shanxi 030031, China;
2. School of Materials Science and Engineering, North University of China, Taiyuan Shanxi 030051, China

Received:2022-04-02 Revised:2022-08-03 Published:2022-10-18

摘要/Abstract

摘要： 为了研究淬火温度对Cr5MoVNi钢组织和性能的影响,采用了1000、1050、1100、1150 ℃淬火、230 ℃回火的热处理工艺。通过光学显微镜(OM)、扫描电镜(SEM)、透射电镜(TEM)、X射线衍射仪(XRD)及压缩试验等方法研究了不同淬火温度下的微观组织和力学性能。研究发现,随着淬火温度升高,试验钢基体中的残留奥氏体明显增多,甚至转变为单一的残留奥氏体;试验钢的硬度单调降低;冲击吸收能量先升高后降低,在1100 ℃达到最大值20.1 J;压缩变形过程中,残留奥氏体发生TRIP效应,是压缩应变超过35%的原因所在。

关键词: 高碳Cr5MoVNi钢, 淬火-回火, 显微组织, 力学性能, 碳化物

Abstract: To investigate the effect of quenching temperature on microstructure and properties of Cr5MoVNi steel, the tested steel was quenched at 1000, 1050, 1100 and 1150 ℃ respectively, and then tempered at 230 ℃. Optical microscope (OM), scanning electron microscope (SEM), transition electron microscope (TEM), X-ray diffraction (XRD) and compressive tests were employed to investigate the microstructure and mechanical properties of the tested steel. The results indicate that, with the increase of quenching temperature, the retained austenite content in the matrix of the steel increases significantly and even reaches to 100% retained austenite; the hardness decreases monotonously, and the impact absorbed energy increases to the peak value of 20.1 J when quenched at 1100 ℃, and then decreases with further increase of quenching temperature. TRIP effect occurs in the retained austenite during compressive deformation, that is the reason why the compressive strain exceeds 35%.

Key words: high-carbon Cr5MoVNi steel, quenching-tempering, microstructure, mechanical properties, carbides

中图分类号:

TG142.1

王世凯, 王睿, 康燕, 于志强, 闫志杰. 淬火温度对Cr5MoVNi钢组织和性能的影响[J]. 金属热处理, 2022, 47(9): 125-129.

Wang Shikai, Wang Rui, Kang Yan, Yu Zhiqiang, Yan Zhijie. Effect of quenching temperature on microstructure and properties of Cr5MoVNi steel[J]. Heat Treatment of Metals, 2022, 47(9): 125-129.

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淬火温度对Cr5MoVNi钢组织和性能的影响

Effect of quenching temperature on microstructure and properties of Cr5MoVNi steel

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