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在K403高温合金的基体上,采用连续CO2激光器熔覆商用司太立合金,分析了激光熔覆层的组织特征和熔覆层熔合质量。结果表明,熔覆层组织由柱状树枝晶和细小等轴晶等构成;良好的熔覆质量与激光熔覆线能量有关,当线能量为200～320 J/mm时可以获得熔合界面良好,无裂纹的熔覆层;熔覆层裂纹与K403合金中沿晶分布的低熔点共晶及碳化物有关。
On the base of K403 superalloy, the commercial Stellite alloy was coated by continuous CO2 laser, and the microstructure and the fusion quality of the cladding layer were analyzed. The results show that the microstructure of the coating consists of columnar dendrites and fine equiaxed grains. The good cladding quality is related to the energy of laser cladding wire. When the energy of wire is 200-320 J / mm, the fusion interface is good, Crack cladding layer; cladding layer crack and K403 alloy along the crystal distribution of low melting point eutectic and carbide related.