Cr-Co-Mo轴承钢的渗碳层组织及摩擦磨损性能

doi:10.13251/j.issn.0254-6051.2025.04.041

金属热处理 ›› 2025, Vol. 50 ›› Issue (4): 264-269.DOI: 10.13251/j.issn.0254-6051.2025.04.041

Cr-Co-Mo轴承钢的渗碳层组织及摩擦磨损性能

李海宏¹, 朱留平^2,3, 庞学东⁴, 孙勇⁴, 迟宏宵³, 谷金波³

1.中国航发哈尔滨东安发动机有限公司, 黑龙江哈尔滨 150066;
2.昆明理工大学材料科学与工程学院, 云南昆明 650093;
3.钢铁研究总院有限公司特殊钢研究院, 北京 100081;
4.抚顺特殊钢股份有限公司, 辽宁抚顺 113001

收稿日期:2024-11-04 修回日期:2025-02-10 发布日期:2025-06-13
通讯作者: 迟宏宵,正高级工程师,博士,E-mail: chihongxiao@163.com
作者简介:李海宏(1979—),女,硕士,主要研究方向为航空金属材料及热处理工艺,E-mail: lihaih1979@126.com。
基金资助:
国家科技重大专项(J2019-Ⅵ-0019-0134)

Microstructure and wear properties of carburized layer on Cr-Co-Mo bearing steel

Li Haihong¹, Zhu Liuping^2,3, Pang Xuedong⁴, Sun Yong⁴, Chi Hongxiao³, Gu Jinbo³

1. AECC Harbin Dong'an Engine Co., Ltd., Harbin Heilongjiang 150066, China;
2. Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming Yunnan 650093, China;
3. Research Institute of Special Steels, Central Iron and Steel Research Institute Co., Ltd., Beijing 100081, China;
4. Fushun Special Steel Co., Ltd., Fushun Liaoning 113001, China

Received:2024-11-04 Revised:2025-02-10 Published:2025-06-13

摘要/Abstract

摘要： 利用金相显微镜、扫描电镜、硬度测试及Thermo-Calc软件计算等方法研究了经1060 ℃淬火、-73 ℃冷处理两次和540 ℃回火两次的Cr-Co-Mo渗碳轴承钢的渗碳层组织特征及摩擦磨损性能。结果表明,试验钢在980 ℃经50 h低压脉冲渗碳处理后,渗碳层主要含有M₂₃C₆碳化物,同时也含有M₇C₃和M₆C碳化物。渗碳显著提高了试验钢的硬度,表面硬度提高约230 HV,渗层深度约为1.52 mm。试验钢未渗碳时的摩擦因数较大,且磨损体积约为渗碳钢的5倍。经渗碳后的渗碳层仅发生轻微磨损,耐磨性能得到显著改善,主要磨损机制仍为黏着磨损和磨粒磨损。

关键词: 轴承钢, 渗碳, 组织, 碳化物, 硬度, 摩擦磨损性能

Abstract: Microstructure and friction and wear properties of carburized layer of a Cr-Co-Mo carburizing bearing steel after quenching at 1060 ℃, cryogenic treating twice at -73 ℃ and tempering twice at 540 ℃ were investigated by means of metallurgical microscope, scanning electron microscope, hardness test and Thermo-Calc software calculation. The results show that after low pressure pulse carburization at 980 ℃ for 50 h, the carbides in carburized layer of the tested steel are mainly M₂₃C₆, and a small number of M₇C₃ and M₆C carbides. The carburization significantly increases the hardness of the steel, resulting in a increment of 230 HV, and the carburized depth is about 1.55 mm. The friction coefficient of the uncarburized steel is larger, and the wear volume is about 5 times of that of the carburized steel. After carburizing, only slight wear occurs at the carburized layer, the wear resistance is significantly improved, and the main wear mechanisms are still adhesive wear and abrasive wear.

Key words: bearing steel, carburizing, microstructure, carbides, hardness, friction and wear properties

中图分类号:

TG142.1

李海宏, 朱留平, 庞学东, 孙勇, 迟宏宵, 谷金波. Cr-Co-Mo轴承钢的渗碳层组织及摩擦磨损性能[J]. 金属热处理, 2025, 50(4): 264-269.

Li Haihong, Zhu Liuping, Pang Xuedong, Sun Yong, Chi Hongxiao, Gu Jinbo. Microstructure and wear properties of carburized layer on Cr-Co-Mo bearing steel[J]. Heat Treatment of Metals, 2025, 50(4): 264-269.

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Cr-Co-Mo轴承钢的渗碳层组织及摩擦磨损性能

Microstructure and wear properties of carburized layer on Cr-Co-Mo bearing steel

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