一、问题的提出利用国内目前生产的各种喷涂粉末进行氧乙炔火焰喷涂，所得到的涂层孔隙率较大，组织疏松，自身结合强度偏低，宏观硬度也不高。以致在对重载荷滑动磨损零件进行喷涂修复时，发现涂层的耐磨性很差，甚至还出现涂层颗粒脱落，拉伤工作表面，造成严重的早期磨损， First, the issue put forward the use of domestic production of various spray powder oxyacetylene flame spraying, the resulting coating porosity larger, loose organization, its own low bonding strength, macro hardness is not high. So that in heavy-load sliding wear parts for spray repair, found that the wear resistance of the coating is poor, and even coating particles fall off, pulling the work surface, causing severe early wear and tear,