MoNiCu涂层对不同配副的载流摩擦磨损性能研究  

Friction and Wear Performances of MoNiCu Coating Against Different Counterparts Under Electricity

作　　者：刘宇嵩 崔功军 冯小刚 尤世泉 杨荣乾 LIU Yusong;CUI Gongjun;FENG Xiaogang;YOU Shiquan;YANG Rongqian(College of Mechanical and Vehicle Engineering,Taiyuan University of Technology,Taiyuan Shanxi 030024,China;Shanxi Province Mineral Fluid Controlling Engineering Laboratory,Taiyuan Shanxi 030024,China;National-Local Joint Engineering Laboratory of Mining Fluid Control,Taiyuan Shanxi 030024,China)

机构地区：[1]太原理工大学机械与运载工程学院,山西太原030024 [2]山西省矿山流体控制工程实验室,山西太原030024 [3]矿山流体控制国家地方联合工程实验室,山西太原030024

出　　处：《润滑与密封》2025年第4期168-175,共8页Lubrication Engineering

基　　金：山西省基础研究计划项目(202303021211163);山西省回国留学人员科研项目(2021-060);国家自然科学基金项目(51775365,U1910212)。

摘　　要：为探究MoNiCu涂层作为载流部件保护涂层的耐磨性,采用激光熔覆技术在45CrNiMoVA钢表面制备MoNiCu涂层,分别以不锈钢440C、铝合金6061和黄铜H62作为配副,在不同电流强度和滑动速度下研究MoNiCu涂层的载流摩擦磨损性能。结果表明:制备的MoNiCu涂层主要包括Mo、Mo_(1.24)Ni_(0.76)、Cu_(0.81)Ni_(0.19)相,其结构致密,与基体为良好的冶金结合;随着电流强度和滑动速度的增大,MoNiCu涂层与3种摩擦副对摩时均表现出良好的载流摩擦磨损性能,磨损率可低至10^(-6)mm^(3)/(N·m)数量级;在高电流条件下,对摩球受热软化,摩擦过程中涂层表面出现摩擦膜,有效减小了涂层的磨损;当电流强度为17 A时,MoNiCu/440C摩擦副的磨损机制为磨粒磨损、电弧侵蚀和氧化磨损,MoNiCu/6061摩擦副的磨损机制为磨粒磨损、黏着磨损和轻微的氧化磨损,而MoNiCu/H62摩擦副的磨损机制为磨粒磨损和塑性变形。研究结果表明,配副材料对MoNiCu涂层载流摩擦磨损性能的影响与摩擦对偶的硬度和导热性紧密相关。In order to investigate the wear resistance of MoNiCu coating as a protective coating for current-carrying parts,MoNiCu coating was prepared on the surface of 45CrNiMoVA steel by laser cladding technology.The friction and wear performances of MoNiCu coating during current-carrying were studied under different current intensities and sliding velocities,with 440C,6061 and H62 as counterparts.The results show that the MoNiCu coating exhibits a dense microstructure,primarily consisting of Mo,Mo_(1.24) Ni_(0.76) and Cu_(0.81)Ni_(0.19) phases,and demonstrates excellent metallurgical bonding with the substrate.Under increasing current intensities and sliding velocities,the MoNiCu coating displays superior friction and wear performances against allthree friction pairs under current-carrying condition,with a wear rate as low as 10^(-6)mm^(3)/(N·m)order of magnitude.Under high current intensities,the grinding balls are softened,and a surface film is formed on the coating surface during the friction process,effectively reducing the wear of the coating.At a current intensity of 17 A,the wear mechanism of MoNiCu/440C friction pair is abrasive wear,arc erosion and oxidative wear,and that of MoNiCu/6061 friction pair is abrasive wear,adhesive wear and slight oxidative wear,while the wear mechanism of MoNiCu/H62 friction pair is abrasive wear and plastic deformation.The findings underscore that the influence of counter materials on the current-carrying friction and wear performance of MoNiCu coatings is closely related to the hardness and thermal conductivity of the friction pair.

关 键 词：Mo基涂层 激光熔覆 摩擦对偶 载流摩擦磨损 磨损机制 

分 类 号：TH117.1[机械工程—机械设计及理论]