【摘要】 对 Incoloy 800H 合金表面激光熔覆 SiC 后的显微组织进行了分析。熔覆层通过柱状晶过渡区与基体牢固结合,熔覆层的维氏硬度有较大提高。SiC 颗粒在熔覆处理中发生了部分分解,形成大量弥散分布的粒状 M₇C₃共晶碳化物。另外熔覆处理还导致了高密度位错亚结构的产生。更多还原

【Abstract】 A 2kW transverse flow CO₂ laser was applied to Incoloy 800H alloyand the microstructure of the coating was investigated.It has been shown thatthe coating has a good bonding with the substrate and the microhardness ofthe coating is increased.Partial dissolution of SiC and formation of dispersedM₇C₃ eutectic carbides were occurred.High density dislocations have been alsoobserved in the coating.更多还原