高性能渗氮钢微动磨损性能研究  

Fretting Wear of a High-Performance Plasma Nitrided Steel

作　　者：屈盛官[1] 王光宏[1] 李文龙[1] 李小强[1] 杨卯生[2] 

机构地区：[1]华南理工大学机械与汽车工程学院,广东广州510640 [2]钢铁研究总院结构材料研究所,北京100081

出　　处：《摩擦学学报》2012年第5期486-492,共7页Tribology

基　　金：国家自然科学基金(51174095);973前期专项(2010CB635104)资助~~

摘　　要：采用等离子渗氮技术在1种高性能钢材表面进行了等离子渗氮.对处理后的试样进行了金相组织分析,测试了渗氮层的显微硬度,然后在SRV IV试验机上在常温条件下考察了渗氮钢微动摩擦磨损性能.结果表明:经等离子渗氮后试样表面形成了硬度较高的渗氮层,渗层硬度最大值是基体硬度的2.8倍;与未渗氮样相比,干摩擦时表面摩擦系数、磨损体积降低最大幅度分别约为28%、80%,渗氮样的主要磨损机理为氧化磨损和疲劳剥落;油润滑时表面摩擦系数、磨损体积降低最大幅度分别约为37%、97%,渗氮样主要磨损机理为磨粒磨损和裂纹扩展引起的细块状剥落;渗氮处理后的试样表面抗微动磨损性能更加优异.Plasma nitriding is applied on the surface of a kind of high -performance bearing steels. The microstructure and the mierohardness of the nitrided layer are analyzed, and the fretting friction and wear properties of the plasma nitrided steel are investigated at the SRV IV tribo - meter at room temperature. The results indicate that the surface of every plasma nilrided sample formed a higher hardness layer, the maximum hardness of the layer was as 2.8 times as that of the matrix. Without lubrication, the friction coefficient and wear volume are reduced approximately by 25% , 80% , respectively, and the wear mechanisms of nitrided specimens are oxidation wear and spalling wear of oxides. Under oil lubrication, the friction coefficient and the wear volume are reduced approximately by 36% and 97% , respectively, and the wear mechanisms of nitrided specimens are abrasive wear and fine massive spalling by crack extension. Plasma nitfided sample shows much better wear resistance than that the substrate.

关 键 词：等离子渗氮 微动磨损 摩擦系数 剥落 磨粒磨损 

分 类 号：TH117[机械工程—机械设计及理论]