线接触副球墨铸铁表面激光织构对摩擦学特性的影响

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To investigate the influence of laser surface texturing on the tribological properties of ductile cast iron under line contact conditions, the Q switched light-pumped Nd：YAG laser was used with laser processing technology of single pulse at a time and repeating at intervals to treat the ductile cast iron specimen end face. The regular network of micro-dimples with four different depth and four different area density were fabricated. A series of contrast experiments on the ductile cast iron specimen were performed by the line contact conditions on cylindrical pin-on-disc friction and wear tester to realize slide-roll combi- nation movement. The experimental results show that compared with the smooth surface under the same test condition, micro-dimples surface has better friction reducing effect. The effects of micro-dimple depth and area density on the tribological properties were also investigated. There are optimum design pa- rameters of miero-dimples to aehieve the best effeet of friction reduction and enhanced anti-scuffing performance.为研究线接触情况下激光表面织构对球墨铸铁摩擦学特性的影响,采用调Q半导体泵浦YAG激光器,利用单脉冲同点间隔多次激光加工工艺,对球墨铸铁试样端面进行表面织构化处理.制备出4种不同深度、不同面积占有率的环形阵列分布微凹腔,并在滚滑复合运动的圆柱销与圆盘端面线接触式摩擦磨损试验机上,进行摩擦学试验.结果表明：在相同试验条件下,与光滑试样进行对比,微凹腔试样表面具有较好的减摩效果;对不同深度及面积占有率的微凹腔试样进行摩擦性能试验,结果显示：均存在优化设计值使得织构化表面的摩擦因数最小,并表现出良好的抗擦伤性能.