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采用WokaStar-600(Sulzer Metco公司生产)HVOF喷涂系统制备MCrAlY涂层,并对原涂层、封闭涂层及热震处理后涂层进行了组织形貌分析。结果表明:涂层中主要为fcc结构γ-Co(Ni)和bcc结构β-Co(Ni)Al相;封闭热处理后涂层组织更均匀,涂层内Al颗粒减少,β相减少,γ相增多,涂层氧化少,硬度增加;热震处理后涂层β-Co(Ni)Al相、Y2O3和Al颗粒增多,硬度降低。
The WokaStar-600 (Sulzer Metco) HVOF spray system was used to prepare the MCrAlY coating. The original coating, the sealing coating and the thermal shock coating were analyzed. The results show that the coating is mainly composed of γ-Co (Ni) fcc structure and β-Co (Ni) Al phase of bcc structure. After the heat treatment, the microstructure of the coating is more uniform and the Al particles in the coating decrease, Increased, the coating less oxidation, increased hardness; thermal shock after the coating β-Co (Ni) Al phase, Y2O3 and Al particles increased hardness decreased.