贝氏体与马氏体GCr15SiMo轴承钢的摩擦磨损性能  

Friction and wear properties of GCr15SiMo bearing steel with bainite and martensite

作　　者：苗红梅 毛艳珊 傅丽华 魏超凡 MIAO Hong-mei;MAO Yan-shan;FU Li-hua;WEI Chao-fan(Luoyang LYC Bearing Co Ltd,Luoyang 471000,China;National and Local Joint Engineering Laboratory of High end Bearing Tribology and Application at Henan University of Science and Technology,Luoyang 471023,China;Luoyang Bearing Research Institute Co Ltd,Luoyang 471003,China)

机构地区：[1]洛阳LYC轴承有限公司,河南洛阳471000 [2]河南科技大学高端轴承摩擦学技术与应用国家地方联合工程实验室,河南洛阳471023 [3]洛阳轴承研究所股份有限公司,河南洛阳471003

出　　处：《材料热处理学报》2025年第1期81-88,共8页Transactions of Materials and Heat Treatment

基　　金：中国博士后科学基金面上资助项目(2020M682316);河南省科技攻关项目(212102210117)。

摘　　要：首先,对GCr15SiMo轴承钢进行了等温淬火与传统油淬两种工艺的热处理,分别得到了以贝氏体和马氏体为主的组织,分析了贝氏体与马氏体GCr15SiMo轴承钢的显微组织、力学性能以及干摩擦与脂润滑条件下的摩擦磨损性能。结果表明:等温淬火后,GCr15SiMo轴承钢的组织主要由贝氏体、残留奥氏体、未溶碳化物和马氏体组成,传统油淬工艺得到的组织主要为马氏体、球状碳化物和残留奥氏体。与马氏体组织钢相比,贝氏体组织钢虽然硬度稍低,但其具有良好的韧性。在干摩擦和脂润滑条件下,贝氏体组织钢的磨损率分别为1.30×10^(-6)和0.36×10^(-6)mm^(3)·N^(-1)·m^(-1),比马氏体组织钢的磨损率分别降低了约43%和59%,磨损机制主要为粘着磨损和磨粒磨损。Firstly,two heat treatments,isothermal quenching and traditional oil quenching,were performed on GCr15SiMo bearing steel to obtain microstructure mainly composed of bainite and martensite,respectively.Microstructure,mechanical properties,and friction and wear performance under dry friction and grease lubrication conditions of the GCr15SiMo bearing steel with bainite and martensite were analyzed.The results show that after isothermal quenching,the microstructure of the GCr15SiMo bearing steel is mainly composed of bainite,retained austenite,undissolved carbides and martensite,and the microstructure obtained by traditional oil quenching process is mainly martensite,spherical carbides and retained austenite.Compared with the martensitic structure steel,the bainitic structure steel has good toughness although its hardness is slightly lower.Under dry friction and grease lubrication conditions,the wear rates of the bainitic structure steel are 1.30×10^(-6)mm^(3)·N^(-1)·m^(-1)and 0.36×10^(-6)mm^(3)·N^(-1)·m^(-1),respectively,which are about 43%and 59%lower than those of the martensitic structure steel.The wear mechanisms are mainly adhesive wear and abrasive wear.

关 键 词：轴承钢 贝氏体 马氏体 脂润滑 摩擦磨损 

分 类 号：TG142.4[一般工业技术—材料科学与工程]