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以三种不同质量分数配比为40%Ti–19.5%Ti C–40.5%WS_2、40%Ti–25.2%Ti C–34.8%WS_2、40%Ti–29.4%Ti C–30.6%WS_2的复合粉末为预置原料,采用激光熔覆技术在钛合金TA2表面原位合成自润滑耐磨复合涂层.系统地分析了涂层的物相、组织、显微硬度及其摩擦学性能与机理.结果表明:三种涂层的显微硬度分别为HV_(0.5)927.1、HV_(0.5)1007.5和HV_(0.5)1052.3,相对于基体(HV_(0.5)180)有极大的提高;三种涂层的摩擦系数和磨损率分别为0.41和30.98×10~(–5) mm~3/(N·m);0.30和18.92×10~(–5) mm~3/(N·m)以及0.34和15.98×10~(–5) mm~3/(N·m).WS_2质量分数为34.8%和30.6%的预置粉末制备的涂层表现出较好的耐磨减摩性能,其磨损机理为轻微的塑性变形和黏着磨损.
The composite powder with three different mass fractions of 40% Ti-19.5% Ti C-40.5% WS 2, 40% Ti-25.2% Ti C-34.8% WS 2, 40% Ti-29.4% Ti C-30.6% WS 2 In order to preset the raw materials, the laser cladding technology was used to synthesize the self-lubricating and wear-resistant composite coating on the surface of TA2 titanium alloy in situ. The phase, microstructure, microhardness and tribological properties and mechanism of the coating were systematically analyzed. The results show that the microhardness of the three coatings are HV 0.5277.5 HV 1007.5 and HV 0.5532.3, respectively, which are greatly improved compared with the HV 0.5 0.580. Three coatings The friction coefficient and wear rate are 0.41 and 30.98 × 10 -5 mm 3 / (N · m), 0.30 and 18.92 × 10 -5 mm 3 / (N · m) 15.98 × 10 ~ (-5) mm ~ 3 / (N · m) .The coatings prepared by pretreating powder with mass fraction of 34.8% and 30.6%, respectively, showed good wear and friction reducing properties, the wear mechanism was Slight plastic deformation and adhesive wear.