高温润滑脂中WS_2亚微米粒子的摩擦学性能研究

以新型润滑材料WS2亚微米粒子作为高温润滑脂添加剂,对其在高温润滑脂中于不同温度下所起的抗磨、减摩、抗极压等摩擦学性能进行了研究,并用电子探针显微镜和俄歇电子能谱仪分析了钢球磨斑表面形貌与表面典型元素的面分布和深度分布.结果表明:在不同温度尤其高温下,WS2亚微米粒子能显著提高润滑脂的摩擦学性能;在摩擦过程中,WS2亚微米粒子在摩擦副表面形成WS2吸附膜和含Fe、S的化学反应膜来有效减少摩擦磨损,增强润滑脂的抗磨、减摩和极压性能,从而更好地保护摩擦表面.

Tribological Performance of High Temperature Grease containing WS2 Submicron Particles

A new lubricating material,WS₂ submicron particle, was used as an additive of high temperature grease and its effects on tribological performance of grease at elevated temperatures were investigated. The morphologies, surface distribution and depth profiles of typical elements on the worn surfaces of steel balls were analyzed by Electron probe microanalysis (EPMA) and Auger electron spectroscopy (AES). Results showed that at elevated temperatures WS₂ submicron particle improved the tribological performances of grease, especially at high temperature. During sliding, adsorbed WS₂ film and tribo-chemical film composed of elements Fe and S on the worn surfaces effectively reduced friction and wear and thereby improved the anti-wear, anti-friction and extreme pressure properties of grease.