表面凹凸微织构增强磁控溅射MoS_(2)薄膜润滑性能研究  

Enhanced Lubricating Properties of Sputtered MoS_(2)Thin Films by Surface Concave-convex Microstructure

作　　者：刘悦 吴振江 黄俊奇 马捷[1] 李洪义[1] 陈树群 LIU Yue;WU Zhenjiang;HUANG Junqi;MA Jie;LI Hongyi;CHEN Shuqun(College of Materials Science and Engineering,Beijing University of Technology,Beijing 100124,China;Beijing Research Institute of Machinery Industry Automation Co.,Ltd.,Engineering Research Center of Electrophysical Apparatus and Application Technology,Beijing 100120,China)

机构地区：[1]北京工业大学材料科学与工程学院,北京100124 [2]北京机械工业自动化研究所有限公司电气物理设备技术工程事业部,北京100120

出　　处：《中国钨业》2024年第3期39-47,共9页China Tungsten Industry

基　　金：北京市科协青年人才托举工程(BYESS2023059)。

摘　　要：轴承钢的表面形貌对其摩擦磨损性能有很大影响,本文采用激光加工技术对GCr15轴承钢进行表面织构化处理,系统研究了织构类型、织构密度及载荷对MoS_(2)薄膜润滑性能的影响规律。研究表明,MoS_(2)薄膜在凹凸微织构表面的润滑寿命(556 min)显著高于凹孔微织构表面(39 min)和光滑表面(46 min),并在30 N的外加载荷下呈现出超低的摩擦系数(0.064)。分析发现凹凸微织构中的微凸结构在被磨球挤压后会与MoS_(2)一起存储于相邻微孔中,进而在后续摩擦过程中持续释放润滑材料,显著延长润滑寿命。此外,相对于高织构密度,低织构密度会更有利于MoS_(2)润滑效果的提升。本研究的开展对于提升MoS_(2)固体润滑材料的使用效能具有积极意义。A concave-convex microtextured surface was fabricated on GCr15 bearing steel using laser processing techniques.The effects of texture type,texture density,and load on the lubrication performance of MoS_(2)films were systematically investigated.The results indicate that the lubricating lifetime of MoS_(2)on the concave-convex microtextured surface(556 min)is significantly greater than that on the pit microtextured surface(39 min)and the smooth surface(46 min).Notably,an ultra-low friction coefficient of 0.064 was observed on the concave-convex microtextured specimen under a normal load of 30 N.Analysis results reveals that the micro-convex structures within the concave-convex microtexture,when compressed by the grinding ball,retain MoS_(2)within adjacent micropores.This results in a continuous release of the lubricant during the friction process,which greatly extends the lubrication life.Furthermore,lower texture densities are found to be more beneficial for enhancing the lubrication performance of MoS_(2)in comparison with higher densities.These findings have significant implications for improving the effectiveness of MoS_(2)solid lubricants in practical applications.

关 键 词：表面织构 MoS_(2)薄膜 固体润滑 摩擦学特性 

分 类 号：TG176[金属学及工艺—金属表面处理] TG115.5[金属学及工艺—金属学]