青铜-石墨热喷涂层在干摩擦和水润滑条件下的摩擦磨损性能  

A Comparative Investigation of the Tribological Behavior and Wear Mechanism of Bronze-graphite Thermal Spraying Coating under Dry and Water-lubricated Sliding against Steel

作　　者：支龙[1] 吴新跃[1] 崔玉舸 

机构地区：[1]海军工程大学动力工程学院,湖北武汉430033 [2]沈阳市装甲兵军事代表局,辽宁沈阳110026

出　　处：《润滑与密封》2006年第3期50-51,54,共3页Lubrication Engineering

摘　　要：在MM-200摩擦磨损试验机上研究了青铜-石墨热喷涂层在干摩擦和水润滑条件下的摩擦磨损性能,采用扫描电镜(SEM)对磨损表面形貌进行了观测和采用X射线能谱分析(XPS)分析了涂层成分。结果表明,在水润滑条件下涂层摩擦因数和磨损率均低于干摩擦条件下;在水润滑条件下磨损机制为轻微磨粒磨损和犁削磨损,在干摩擦下主要是较为严重的粘着磨损和犁削。这是由于水润滑降低了摩擦副界面温度,提高了石墨润滑膜的韧性,改善了润滑效果,从而阻止了粘着磨损的发生,水还促进了钢偶件表面致密氧化膜的形成,从而减轻磨损。因此水润滑对涂层磨损性能有较大影响。The tribological property of bronze-graphite thermal spraying coating under dry and water-lubricated sliding against stainless steel was comparatively studied with the MM-200 friction and wear tester. The wear mechanisms of the coating were examined based on scanning electron microscopic and X-ray photo electron spectrometric analyses of the worn surfaces of the composite and counterpart. As a results ,the friction coefficient and wear rate under water-lubricated is lower than that under dry sliding. The wear mechanism under water-lubricated is slight abrasion and plough wear,and it is adhesion and plough wear under dry sliding. The surface temperature of couple-material is decreased and the toughness of graphite lubricating film is improved under water-lubrication, so the adhesion wear is restrained. The generation of compact oxide film on the surface of counterpart steel is promoted by water, hence the wear rate is reduced. So water-lubricated has great effect on wear property of the coating.

关 键 词：热喷涂 青铜 石墨 摩擦磨损 水润滑 

分 类 号：TG174.442[金属学及工艺—金属表面处理]