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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 M_7C_3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。
The microstructure of the incoloy 800H alloy surface after laser cladding SiC was analyzed. The cladding layer is firmly bonded to the substrate through the transition region of columnar crystals, and the Vickers hardness of the cladding layer is greatly increased. SiC particles partially decomposed during the cladding process to form a large amount of granular M_7C_3 eutectic carbide dispersedly distributed. In addition cladding treatment also led to the generation of high-density dislocation sub-structure.