激光脉冲次数对织构化涂层的摩擦学性能影响

采用Nd∶YAG固体脉冲激光器对45钢盘表面进行了织构化处理，形成了具有不同微孔深度的织构化阵列。在织构化钢盘表面制备了Ni-MoS2复合镀层，对Al2O3陶瓷球/45钢盘进行了摩擦性能测试，并对试样表面的磨损形貌进行了分析。结果表明，不同脉冲次数对微孔最大直径的影响较小，但随着脉冲次数的增加，微孔深度和内部空腔体积显著增大。在干摩擦条件下，具有织构化阵列的复合镀层摩擦系数比未织构镀层的降低0.1~0.15，且随着微孔深度的增加，摩擦系数进一步降低，其中40个脉冲形成的织构化镀层具有最佳的抗磨减摩性能，且磨损寿命是20个脉冲形成的织构化镀层的3倍。

Abstract

The texturing process on 45 steel disc surface is done by using Nd∶YAG solid pulsed lasers and the textured arrays with different micro-hole depths are formed. The Ni-MoS2 composite coatings are prepared on the surfaces of textured steel discs. The test of the tribological performance of Al2O3 ceramic ball/45 steel disc is done, and the worn morphology of sample surfaces is analyzed. The results show that number of pulses has a small influence on the maximum diameters of micro-holes. As the number of pulses increases, the depths of micro-holes and the volumes of internal cavities increase significantly. Under the dry friction condition, the friction coefficient of textured-coating is less than that of untextured-coating by 0.1-0.15, and the friction coefficient is further decreased with micro-hole depths increasing. The textured coating with 40 pulses has the best antifriction property, and its wear life is three times of that of the textured coating with 20 pulses.

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万轶, 李建亮, 熊党生, 李航. 激光脉冲次数对织构化涂层的摩擦学性能影响[J]. 激光与光电子学进展, 2017, 54(3): 031403. Wan Yi, Li Jianliang, Xiong Dangsheng, Li Hang. Effect of Number of Laser Pulses on Tribological Property of Textured-Coating[J]. Laser & Optoelectronics Progress, 2017, 54(3): 031403.

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