脂润滑条件下微凹坑表面的摩擦特性研究

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In order to discuss the tribological properties of the laser-textured concave surfaces under grease lubrication, five specimens of different surfaces which had the same concave diameter, spacing and different concave depths were designed and manufactured. A series of face-to-face tribological tests under different loads and velocities with grease lubrication were conducted on a HDM20 face-to- face contact tribotester. The effect of surface topography on tribological properties was investigated. The results show that under face-to-face contact and grease lubrication, the influence of the surface topography with different concave depths on the friction coefficient is obvious. Appropriate concave depth can improve the tribological properties and temperature characteristics, but too deep or too shal- low concave is not helpful to improve the tribological properties.文章为了探讨脂润滑条件下激光加工微凹坑表面的摩擦特性，设计并制造了5组不同的表面，其微凹坑直径、间距相同，但深度不同，在HDM20端面摩擦磨损试验机上，采用脂润滑，在不同载荷、转速等工况条件下进行了一系列的面接触摩擦磨损实验，并分析了表面形貌对摩擦特性的影响。结果表明，面接触脂润滑条件下，不同微凹坑深度的表面微观结构特性对摩擦系数的影响显著，适当的凹坑深度可以改善表面的摩擦特性和温度特性，凹坑太深或太浅均不利于改善摩擦副的摩擦特性。