Incoloy 800H合金表面激光熔覆SiC的显微组织分析  

MICROSTRUCTURE OF LASER SURFACE CLADDED——Incoloy 800H ALLOY WITH SiC

作　　者：王来[1] 祝苏明[1] 王富岗[1] 安世民[1] 

机构地区：[1]大连理工大学

出　　处：《金属热处理学报》1993年第4期35-39,共5页

基　　金：三束材料改性国家实验室资助项目

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 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。A 2kW transverse flow CO_2 laser was applied to Incoloy 800H alloy and the microstructure of the coating was investigated.It has been shown that the coating has a good bonding with the substrate and the microhardness of the coating is increased.Partial dissolution of SiC and formation of dispersed M_7C_3 eutectic carbides were occurred.High density dislocations have been also observed in the coating.

关 键 词：激光熔覆 耐热合金 碳化硅 

分 类 号：TG156.99[金属学及工艺—热处理]