目的 通过在摩擦副表面进行激光微织构加工，研究不同分布形式的微织构对摩擦副的减摩作用效果，为微织构摩擦副在实际工程应用中的设计与选用提供参考。方法 选取45#钢作为摩擦材料制备环环接触的摩擦副，通过激光微雕刻在试件表面加工一定尺寸的微织构，在油润滑条件下，利用万能摩擦磨损试验机进行摩擦磨损实验，并通过超景深三维显微镜观察磨损表面，研究不同微织构在油润滑方式下对摩擦副的减摩作用机理及具体影响规律。结果 带有合理分布形式微织构的摩擦副接触表面能产生明显的动压润滑效应，其中径向沟槽微织构和凹坑状微织构在稳定磨损阶段的摩擦系数明显小于光滑表面，分别能减小摩擦系数16%和11%，局部网状微织构的摩擦系数与光滑表面没有明显差异，周向沟槽微织构的摩擦系数大于光滑表面。带有径向沟槽和凹坑微织构的摩擦副相比于光滑表面，温升有所降低，而周向沟槽和局部网状微织构随着摩擦表面磨损的加剧，温升更加明显，下试件分布有微织构的摩擦副接触表面摩擦系数要明显小于上试件分布有微织构的摩擦副。磨损局部放大图中，凹坑状微织构表面产生的磨粒剥落痕迹要明显浅于光滑试件表面，说明微织构能有效存储磨损磨粒，减少二次磨损对摩擦表面的破坏。结论 表面微织构能有效改善摩擦副的润滑性能，合理选择微织构分布形式和分布位置，才能最大限度地发挥微织构的减摩效果。

The work aims to carry out laser micro texture processing on the surface of friction pairs to study the anti-friction effect of micro texture in different distribution forms on friction pairs and then provide a reference for the design and selection of micro texture friction pairs in practical engineering applications. In order to explore the friction reduction effect of different micro textures on friction surface, 45# steel was selected as friction material to prepare the ring to ring contact friction pair. The micro texture of a certain size was processed on the surface of the specimen by laser micro-carving. The friction experiment was carried out by the universal friction and wear tester under the condition of oil lubrication, and the worn surface was observed by three dimensional microscope to study the anti-friction mechanism and specific influence laws of different micro textures under lubrication mode. Experimental results showed that the contact surface of the friction pair with the rational distribution of micro texture could produce obvious dynamic lubrication effect. The friction coefficient of radial groove micro texture and pits micro texture was obviously smaller than that of smooth surface at stable wear stage. The friction coefficient could be respectively re-duced by 16% and 11%. The friction coefficient of the local reticulation micro texture was not significantly different from that of the smooth surface and the friction coefficient of the circumferential groove texture was larger than that of the smooth surface. The friction pairs with the radial grooves and the concave micro texture had a lower temperature rise compared with the smooth surface, while the temperature rise of the circumferential grooves and the local reticular micro texture were more obvious with the increase of the friction surface wear. The friction coefficient of the frictional pair with micro texture distributed on the lower part of the specimen was significantly less than that of the friction pairs with micro texture on the upper part. The trace of abrasive particles on the surface of the pits micro texture surface was obviously lighter than that on the smooth specimen surface. Micro texture could effectively store wear debris and reduce damage of the second wear and tear on the friction surface. The surface micro texture can effectively improve the lubrication performance of the friction pair, the rational selection of the microtexture distribution and distribution position can maximize the effect of the microtexture reduction.