金属热处理 ›› 2022, Vol. 47 ›› Issue (12): 181-187.DOI: 10.13251/j.issn.0254-6051.2022.12.031

• 组织与性能 • 上一篇    下一篇

GCr15轴承钢低温离子渗硫层的组织与耐磨性能

李德1, 单琼飞2, 王鑫2, 刘勇1, 周孟1, 张毅1   

  1. 1.河南科技大学 材料科学与工程学院, 河南 洛阳 471023;
    2.洛阳轴承研究所有限公司, 河南 洛阳 471039
  • 收稿日期:2022-08-03 修回日期:2022-11-04 出版日期:2022-12-25 发布日期:2023-01-05
  • 通讯作者: 刘 勇,教授,博士,E-mail:liuyong@haust.edu.cn
  • 作者简介:李 德(1997—),男,硕士研究生,主要研究方向为热处理和表面改性,E-mail:lide020230@163.com。

Microstructure and wear resistance of GCr15 bearing steel with low-temperature plasma sulfurizing coatings

Li De1, Shan Qiongfei2, Wang Xin2, Liu Yong1, Zhou Meng1, Zhang Yi1   

  1. 1. School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang Henan 471023, China;
    2. Luoyang Bearing Research Institute Co., Ltd., Luoyang Henan 471039, China
  • Received:2022-08-03 Revised:2022-11-04 Online:2022-12-25 Published:2023-01-05

摘要: 采用OM、XRD、SEM和UMT摩擦磨损试验机等对不同表面处理后GCr15轴承钢的显微组织和耐磨性能进行了研究。结果表明,相比于碳氮共渗后的GCr15轴承钢,碳氮共渗+低温渗硫后的GCr15轴承钢表面形成了以FeS为主的渗硫层,其微观形貌呈现均匀细小的颗粒状,虽硬度略有下降,但摩擦因数和体积磨损率均明显降低,可显著提高轴承材料表面抗擦伤、抗咬合的能力,从而延长轴承零部件的使用寿命;在磨损过程中,FeS层发生脱落、产生涂抹效应,显著降低了磨粒磨损的程度。通过磨损形貌分析,磨损机制为磨粒磨损和粘着磨损。

关键词: GCr15轴承钢, 低温离子渗硫, 自润滑, 显微组织, 耐磨性能

Abstract: Microstructure and wear resistance of GCr15 bearing steel after different surface treatments were studied by means of OM, XRD, SEM and UMT friction and wear tester. The results show that compared with that carbonitrided, a FeS-based sulfurized layer with uniform and fine microstructure is formed on the surface of the GCr15 bearing steel after carbonitriding and low-temperature plasma sulfurizing, though the hardness decreases slightly, the friction coefficient and volume wear rate are significantly reduced, so that the ability of the bearing steel surface to resist scratching and to anti-biting is significantly improved, the service life of the bearing is also prolonged. During the wear process, the FeS layer falls off and produces a smearing effect, which significantly reduces the degree of abrasive wear. The analysis of the wear morphology confirms that the wear mechanisms are abrasive wear and adhesive wear.

Key words: GCr15 bearing steel, low-temperature plasma sulfurizing, self lubrication, microstructure, wear resistance

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