ABSTRACT

During friction and wear, the friction coefficient of cemented carbide could be significantly reduced through surface texturing. In this work, we conducted a comparative analysis of the friction and wear resistance of the micro-textured surface and lubricated micro-textured surface and analysed the lubrication mechanism of the micro-textured surface with the solid lubrication. In particular, the effect of the micro-texture size on the friction coefficient was assessed, implying that the friction coefficient curve of the textured surface is more stable than that of the nontextured surface. In addition, the lubricated surface with the micro-texture exhibited a minimum friction coefficient, which was only ∼0.25 of that of the nonlubricated surface. Micro-pits texture could store a certain amount of the lubricating agent, eventually reducing the friction coefficient. The diameter of the micro-pits texture, friction coefficient, texture depth, and texture spacing increased within the selected parameter range, the friction coefficient first decreased and then increased.

摘要

在摩擦磨损过程中，通过表面织构可以显着降低硬质合金的摩擦系数。在这项工作中，我们对微织构表面和润滑微织构表面的摩擦磨损性能进行了对比分析，并分析了微织构表面与固体润滑的润滑机理。特别地，评估了微纹理尺寸对摩擦系数的影响，这意味着纹理表面的摩擦系数曲线比非纹理表面的摩擦系数曲线更稳定。此外，具有微纹理的润滑表面表现出最小摩擦系数，仅为非润滑表面的~0.25。微坑纹路可储存一定量的润滑剂，最终降低摩擦系数。微坑纹理直径、摩擦系数、纹理深度和纹理间距在选定参数范围内增大，摩擦系数先减小后增大。