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本文采用超音速火焰喷涂(HVOF)工艺制备了2种多峰结构和1种亚微米结构WC-12Co涂层,并采用SEM、XRD等方法对3种涂层进行了显微组织、孔隙率、相结构及显微硬度分析;在进行涂层球盘摩擦磨损试验的基础上,探讨了多峰WC-12Co涂层的磨损机理.研究结果表明:由含30%纳米WC-12Co的粉末制备的多峰涂层WC氧化脱碳程度最低,显微硬度最高;采用含50%纳米WC-12Co的粉末制备的多峰涂层孔隙率最低、耐磨损性能最为优良.
In this paper, two multimodal structures and one submicron WC-12Co coating were prepared by HVOF process. The microstructure, porosity, Phase structure and microhardness analysis. The wear mechanism of multi-peak WC-12Co coating was discussed based on the friction and wear test of the coated ball disk. The results show that the wear mechanism of WC- Multi-modality coating WC has the lowest degree of oxidative decarburization and the highest microhardness. The multi-modal coating prepared with 50% nano-WC-12Co powder has the lowest porosity and the best wear resistance.