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以F101镍基自熔性合金粉末和含氧化镧(2%,质量分数)的F101镍基自熔性合金粉末为原料,在合适的激光熔覆参数下,在TC4钛合金表面制备了F101镍基合金涂层及F101+2%La_2O_3镍基合金涂层,对比分析了2种涂层的宏观形貌、相组成、微观组织、显微硬度及与YG6在干摩擦磨损条件下摩擦磨损性能。结果表明:稀土La2O3的添加有效提高了F101镍基合金粉末对激光辐照能量的吸收率;涂层形成更多富Ti物相,组织更加均匀致密;虽然基材元素扩散到涂层中一定程度上降低了涂层的硬度和耐磨性,但与TC4钛合金相比,涂层仍具有较低的摩擦系数(0.41 vs 0.45)和较高的耐磨性(TC4的2.89倍)。
With F101 nickel-based self-fluxing alloy powder and F101 nickel-based self-fluxing alloy powder containing lanthanum oxide (2%, mass fraction) as raw materials, under the suitable laser cladding parameters, F101 nickel Base alloy coating and F101 + 2% La 2 O 3 Ni-based alloy coating, the macroscopic morphology, phase composition, microstructure, microhardness and friction and wear properties of YG6 under dry friction and wear conditions were compared and analyzed. The results show that the addition of rare earth La2O3 effectively increases the absorption rate of laser irradiation energy of F101 nickel base alloy powder. The coating forms more Ti-rich phase and the microstructure is more uniform and compact. Although the diffusion of substrate elements into the coating to some extent Reduces the hardness and wear resistance of the coating but still has a lower coefficient of friction (0.41 vs 0.45) and higher wear resistance (2.89 times that of TC4) compared to the TC4 titanium alloy.