采用超音速火焰喷涂工艺在碳钢表面制备WC-12Co、WC-10Co4Cr、WC-10Ni和WC-20Cr₃C₂-7Ni金属陶瓷涂层，对比研究了不同涂层的物相组成、硬度、耐磨性能和耐腐蚀性能。结果表明：WC-12Co、WC-10Co4Cr和WC-10Ni涂层中均生成了少量W₂C脱碳相；4种涂层均很致密，且与基体结合良好；WC-10Co4Cr和WC-12Co涂层的硬度和耐磨性能相近且最好，WC-10Ni涂层的次之，WC-20Cr₃C₂-7Ni涂层的最差；WC-10Co4Cr涂层的耐腐蚀性能最好，WC-10Ni涂层略次之，WC-20Cr₃C₂-7Ni涂层的最差。WC-10Ni涂层的耐磨性能适中，耐腐蚀性能略低于WC-10Co4Cr涂层的，在正常服役条件下有望替代WC-10Co4Cr涂层用于机械零件表面磨损和腐蚀防护。

WC-based cermet coatings including WC-12Co, WC-10Co4Cr, WC-10Ni and WC-20Cr₃C₂-7Ni were prepared on surface of carbon steel by high velocity oxygen fuel flame spraying. The phase composition, hardness, wear resistance and corrosion resistance of different coatings were investigated and compared. The results show that a few W₂C decarburization phases were formed in WC-12Co, WC-10Co4Cr and WC-10Ni coatings. The four coatings were dense, and well bonded to the substrate. The hardness and wear resistance of WC-10Co4Cr and WC-12Co coatings were similar and the best, followed by those of WC-10Ni coating, and those of WC-20Cr₃C₂-7Ni coating were the worst. The corrosion resistance of WC-10Co4Cr coating was the best, that of WC-10Ni coating was slightly lower, and that of WC-20Cr₃C₂-7Ni coating was the worst. WC-10Ni coating had moderate wear resistance and slightly lower corrosion resistance comparing to WC-10Co4Cr coating, so was suitable to replace WC-10Co4Cr coating for wear and corrosion proof of mechanical part surface under normal service conditions.