二硫化钼基润滑涂层在润滑油中的作用机理及实际应用

Mechanisms of the Molybdenum Disulfide Solid Lubricant Film in Lubrication and its Applications

讨论了在几种液体润滑介质 (液体石蜡、10#机油、HM46液压油) 中, 涂敷FM 510二硫化钼基润滑涂层的摩擦副的摩擦磨损性能和润滑机理。试验机评价和台架考核结果表明, 在润滑油中, 涂敷FM 510涂层的摩擦偶对能够协助流体润滑膜的形成并维持流体润滑状态。扫描电镜观察涂层和对偶的微观表面, 用能谱分析表面元素组成, 揭示了其作用机理: 干摩擦条件下, 二硫化钼基润滑涂层与金属对偶表面的相对滑动, 形成了以Mo、S、Sb为主的转移膜,但在润滑油介质中没有形成这类转移膜; 二硫化钼基润滑涂层的表面有大量的、均匀分布的、直径小于 3μm的孔穴,起到了蓄油作用, 更易于建立流体润滑条件, 形成均匀分布的油膜。

The mechanisms of lubrication, the friction and wear characteristics of the molybdenum disulfide solid lubricant film in the oil were discussed. A ring-on-block type of testing apparatus was used. The testing datas and the results from the tester and the test-bed reveal that the molybdenum disulfide solid lubricant film can help the formation of the liquid lubrication film in the oil. SEM was used to observe and EDS was used to analyze the testing specimens. The lubricating mechanism was found to be completely different in the oil and on the dry friction condition. Under the dry friction condition, the transfer film consisting of Mo, S, Sb occurs during the sliding, but under the oil lubrication condition, there is no same transfer film. Scanning electron microscopy shows that large numbers of voids whose average diameter was less than 3 μm distribute symmetrically in the molybdenum disulfide solid lubricant film. The oil can be stockpiled in those voids and the liquid lubrication film can be easily formed while sliding happens under the oil lubrication condition.