采用德国DILAS-3KW高功率半导体激光器在钛合金表面熔覆了20%W_S2/NiCrBSi复合涂层。利用OM光学显微镜、SEM、HXD-1000显微硬度计等分析了激光功率对熔覆层宏观形貌、稀释率、显微组织及硬度的影响,为良好的熔覆层选择合理的激光参数提供了理论依据。结果表明,在其他激光工艺参数不变的情况下,熔覆层宽度、基体熔深、稀释率均随着激光功率增大而增加;熔覆层的高度呈先增加后减小的趋势;显微组织结构不规则块状相变小,板条状相细化且数量增多,且生长规律有一定的方向性;熔覆层显微硬度呈现先增大后减小的趋势。 A 20% W_S2 / NiCrBSi composite coating was coated on the surface of titanium alloy with German DILAS-3KW high power semiconductor laser. The effects of laser power on the morphology, dilution rate, microstructure and hardness of cladding layer were analyzed by using OM optical microscope, SEM, HXD-1000 microhardness tester and so on to provide reasonable laser parameters for good cladding layer The theoretical basis. The results show that the width of the cladding layer, the penetration depth of the substrate and the dilution rate increase with the increase of the laser power under the condition of other laser parameters unchanged. The height of the cladding layer first increases and then decreases. The microstructure of the microstructure is irregular, the phase change is small, the lamellar phase is refined and the number is increased, and the growth law has a certain directionality. The microhardness of cladding layer first increases and then decreases.