三种超音速热喷涂工艺制备WC-12Co涂层的组织结构分析

Analysis of Microstructure of WC- 12Co Coatings Prepared by the Three Kinds of Supersonic Thermal Spraying Processes

用新研制的超音速等离子喷涂(S-APS)和2种进口超音速火焰喷涂(HVOF)设备制备了WC-12Co涂层,分析了3种喷涂工艺对涂层的表面和断面显微形貌、组织结构、孔隙率和氧化、脱碳,以及涂层的显微硬度、结合强度的影响。结果表明,在所试验的条件下,超音速等离子喷涂WC-12Co涂层显示出最致密的组织结构和最高的显微硬度。

The WC-12Co coatings were sprayed by developed recently supersonic plasma spraying (S-APS) system and two kind of imported HVOF equipment. The influences of three kinds of supersonic thermal spraying processes on the microstructure of coatings, their porosities, microhardness and bonding strength, as well as the decarburization and oxidation of tungsten carbide were analysed. The results showed that S- APS sprayed WC- 12Co coating exhibited excellent microstructure and microhardness.