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采用激光熔覆技术在TA2钛合金表面预置Ti+TiC+WS_2复合粉末制备了自润滑耐磨复合涂层,并对涂层的物相、显微组织、显微硬度和摩擦学性能进行了分析。结果表明:涂层与基体呈冶金结合,无明显气孔和裂纹。涂层主要有α-Ti基体、增强相(Ti,W)C_(1-x)和TiC以及自润滑相Ti_2SC和TiS。涂层的平均显微硬度为1005.4 HV约为基体TA2的5倍。在干摩擦磨损条件下,对比TA2基体,由于涂层中自润滑相Ti_2SC、TiS的存在,涂层摩擦系数波动较平缓,磨损表面呈现轻微的黏着磨损,表现出较优异的耐磨减摩性能。
The laser cladding technology was used to prepare Ti + TiC + WS_2 composite powders on the surface of TA2 titanium alloy to prepare the self-lubricating wear-resistant composite coatings. The phase, microstructure, microhardness and tribological properties of the coatings were also studied analysis. The results show that the coating is metallurgically bonded with the substrate without obvious pores and cracks. The coatings are mainly α-Ti matrix, enhanced phase (Ti, W) C_ (1-x) and TiC and self-lubricating phase Ti_2SC and TiS. The average microhardness of the coating is 1005.4 HV is about 5 times that of the substrate TA2. Under the condition of dry friction and wear, compared with the TA2 matrix, due to the existence of self-lubricating Ti_2SC and TiS in the coating, the friction coefficient of the coating fluctuated gently and the wear surface showed a slight adhesive wear, which showed better wear-resistant and friction reducing properties .