Mo对Fe-Co-Cr系轴承钢组织及强韧性的影响  

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

作　　者：郭春成 迟宏宵[1] 谷金波 董丽丽 朱留平 Guo Chuncheng;Chi Hongxiao;Gu Jinbo;Dong Lili;Zhu Liuping(Research Institute of Special Steels,Central Iron and Steel Research Institute Co.,Ltd.,Beijing 100080,China;Faculty of Materials Science and Engineering,Kunming University of Science and Technology,Kunming Yunnan 650093,China)

机构地区：[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

出　　处：《金属热处理》2025年第3期150-157,共8页Heat Treatment of Metals

基　　金：国家科技重大专项(J2019-VI-0019-0134)。

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M_(23)C_(6);在2%Mo钢中,主要第二相变为M_(23)C_(6)和Laves相;在4.6%Mo钢中,主要第二相种类变为M_(23)C_(6)、Laves相和M 6C;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。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 M_(23)C_(6).In the 2%Mo steel,the primary secondary phases change to M_(23)C_(6)and Laves phase.In the 4.6%Mo steel,the primary secondary phases become M_(23)C_(6),Laves phase and M 6C.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.

关 键 词：轴承钢 钼元素 力学性能 第二相 

分 类 号：TG142.1[一般工业技术—材料科学与工程]