以45钢为基体,以Co45合金粉、微米TiC和微米Y-ZrO_2为熔覆剂,采用激光熔覆技术制备了复合陶瓷涂层。测试和分析了复合陶瓷涂层的硬度、断裂韧性、抗冲击性能以及耐磨损性能。结果表明,当Co45合金粉为90%、微米TiC为5%、微米Y-ZrO_2添加量为5%时,所制备的复合陶瓷涂层性能最佳,其硬度1486 HV1,断裂韧性85.324MPa·m~(1/2),抗冲击次数为52次;在50N摩擦载荷下,其摩擦系数为0.12,磨损率为0.031mm~3/h。 Using 45 steel as substrate, Co45 alloy powder, micron TiC and micron Y-ZrO_2 as cladding agent, laser cladding technology was used to prepare composite ceramic coating. The hardness, fracture toughness, impact resistance and wear resistance of the composite ceramic coatings were tested and analyzed. The results show that the composite ceramic coating has the best performance when the Co45 alloy powder is 90%, the micron TiC is 5% and the micron Y-ZrO 2 is 5%. Its hardness is 1486 HV1, fracture toughness is 85.324MPa · m ~ (1/2), the number of impact resistance is 52; under 50N friction load, the friction coefficient is 0.12 and the wear rate is 0.031mm ~ 3 / h.