应用500 W Nd:YAG固体激光器在纯铜表面原位合成TiB2/Cu复合涂层,测定了熔覆层的显微硬度和导电性,研究了熔覆层的磨损行为和抗电弧烧蚀性能。结果表明,含熔覆层试样的显微硬度由外到里存在明显的梯度变化,其中熔覆层的硬度最高,约为450~490 HV;熔覆层的平均体积导电率约为82.7%IACS,原位合成的细小TiB2相对Cu基体的电导率影响不大;含熔覆层试样的磨损性能明显优于纯铜试样,其主要磨损机制为磨粒磨损;熔覆层内激光原位合成的TiB2颗粒能明显改善Cu基体抗电弧烧蚀的性能。 The TiB2 / Cu composite coating was synthesized on the surface of pure copper by a 500 W Nd: YAG solid laser and the microhardness and electrical conductivity of the coating were measured. The wear behavior and arc ablation resistance of the coating were studied. The results show that the microhardness of the cladding layer varies obviously from outside to inside, the hardness of the cladding layer is the highest, about 450 ~ 490 HV; the average volume conductivity of the cladding layer is about 82.7% IACS, the in-situ synthesis of small TiB2 has little effect on the electrical conductivity of Cu matrix. The wear behavior of the sample with the cladding layer is better than that of the pure copper sample. The main wear mechanism is abrasive wear. Synthesis of TiB2 particles can significantly improve the Cu matrix anti-arc ablation performance.