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为提高水利机械的抗汽蚀性能,采用高速电弧喷涂在1Cr18Ni9Ti不锈钢基体上制备两种Fe基合金涂层。借助光学显微镜、扫描电子显微镜、X射线衍射分析仪、显微硬度计及振动汽蚀设备对涂层组织结构及性能进行分析。结果表明,涂层具有较高的硬度(510HV0.05)及较致密的组织结构(孔隙率10.5%),含有碳铬化合物等陶瓷硬化增强相。高速电弧喷涂能制备具有优良抗汽蚀性能的涂层。
In order to improve the cavitation resistance of hydraulic machinery, two kinds of Fe-based alloy coatings were prepared on 1Cr18Ni9Ti stainless steel substrate by high speed arc spraying. The microstructure and properties of the coatings were analyzed by means of optical microscope, scanning electron microscope, X-ray diffraction analyzer, microhardness tester and vibration cavitation equipment. The results show that the coating has a high hardness (510HV0.05) and a denser structure (porosity 10.5%), with a ceramic hardened reinforcing phase such as a chrome compound. High-speed arc spraying can produce coatings with excellent cavitation resistance.