金属热处理 ›› 2025, Vol. 50 ›› Issue (3): 150-157.DOI: 10.13251/j.issn.0254-6051.2025.03.025

• 材料研究 • 上一篇    下一篇

Mo对Fe-Co-Cr系轴承钢组织及强韧性的影响

郭春成1, 迟宏宵1, 谷金波1, 董丽丽1,2, 朱留平1,2   

  1. 1.钢铁研究总院有限公司 特殊钢研究院, 北京 100080;
    2.昆明理工大学 材料科学与工程学院, 云南 昆明 650093
  • 收稿日期:2024-10-02 修回日期:2025-12-28 出版日期:2025-03-25 发布日期:2025-05-14
  • 通讯作者: 谷金波,高级工程师,博士,E-mail:gujinboustb@163.com
  • 作者简介:郭春成(1997—),男,博士研究生,主要研究方向为高温耐热轴承钢,E-mail:1842703512@qq.com。
  • 基金资助:
    国家科技重大专项(J2019-VI-0019-0134)

Effect of Mo on microstructure and strength and toughness of Fe-Co-Cr bearing steel

Guo Chuncheng1, Chi Hongxiao1, Gu Jinbo1, Dong Lili1,2, Zhu Liuping1,2   

  1. 1. Research Institute of Special Steels, Central Iron and Steel Research Institute Co., Ltd., Beijing 100080, China;
    2. Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming Yunnan 650093, China
  • Received:2024-10-02 Revised:2025-12-28 Online:2025-03-25 Published:2025-05-14

摘要: 研究了Mo元素对Fe-Co-Cr系轴承钢微观组织和室温力学性能的影响规律及机理。结果表明,添加Mo使试验钢中主要第二相种类增多,在0%Mo钢中,主要第二相为M23C6;在2%Mo钢中,主要第二相变为M23C6和Laves相;在4.6%Mo钢中,主要第二相种类变为M23C6、Laves相和M6C;Mo元素的添加增大了残留奥氏体的体积分数和位错密度,细化了马氏体板条宽度;随着Mo含量增加,试验钢强度、冲击性能和硬度呈上升趋势。

关键词: 轴承钢, 钼元素, 力学性能, 第二相

Abstract: Effect law and mechanism of molybdenum (Mo) element on the microstructure and room-temperature mechanical properties of Fe-Co-Cr bearing steel were investigated. The results show that the addition of Mo increases the variety of major secondary phases in the tested steel. In the 0%Mo steel, the primary secondary phase is M23C6. In the 2%Mo steel, the primary secondary phases change to M23C6 and Laves phase. In the 4.6%Mo steel, the primary secondary phases become M23C6, Laves phase and M6C. The addition of Mo element increases the volume fraction of retained austenite and dislocation density, and refines the width of martensite laths. As the Mo content increases, the strength, impact property and hardness of the tested steel show upward trends.

Key words: bearing steel, molybdenum element, mechanical properties, second phase

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