为提高Ti-6Al-4V钛合金的摩擦学性能，以金属陶瓷NiCr-Cr3C2和自润滑颗粒WS2复合合金粉末为原料，采用激光熔覆技术在钛合金表面制备出了以硬质TiC和TiWC2为耐磨增强相、Ti2CS和CrS金属硫化物为自润滑相的高温自润滑耐磨复合涂层。采用 X射线衍射仪(XRD)、扫描电子显微镜(SEM)、能谱仪(EDS)分析了涂层的物相及显微组织结构；分别在室温、300 ℃和600 ℃时利用Si3N4陶瓷球对磨来测试涂层和基体的干滑动磨损性能，并分析了其磨损机理。结果表明：复合涂层的平均硬度为1005 HV0.2，约为基体(360 HV0.2)的3倍，从室温到600 ℃，由于增强相TiC、TiWC2和自润滑相CrS、Ti2CS的综合效应，复合涂层的摩擦系数和磨损率相比基体均显著降低，具有良好的高温自润滑耐磨性能。

To enhance the tribological behaviors of Ti-6Al-4V alloy, high-temperature self-lubricating wear resistant composite coatings reinforced with hard TiC and TiWC2 carbides, self-lubricating Ti2CS and CrS sulfides are fabricated by laser cladding. The phase compositions and microstructures are investigated by X-ray diffractometer (XRD), scanning electron microscope (SEM) and energy dispersive spectrometer (EDS), respectively. Sliding wear tests of the composite coating and substrate are conducted at ambient temperature, 300 ℃ and 600 ℃, with the Si3N4 ceramic ball as the counter-body, and the corresponding wear mechanisms are discussed. Results indicate that the mean microhardness of the composite coating (1005 HV0.2) is about 2 times higher than that of substrate (360 HV0.2). From ambient temperature to 600 ℃, due to the combined effects of hard TiC and TiWC2 carbides and self-lubricating Ti2CS and CrS sulfides, both the friction coefficient and wear rate of the composite coating decrease in comparison with the substrate. The composite coating has excellent high temperature self-lubricating and wear resistant properties.