针对球阀的失效原因,采用等离子喷涂技术和电刷镀技术分别对阀芯、阀座进行了表面处理,并从配对的耐磨损性能,阀芯涂层的显微硬度、结合强度和抗热震性能方面进行了评价。结果表明,处理后的阀芯和阀座的耐磨损性能明显提高;其中,由等离子喷涂Al2O3-TiO2金属陶瓷涂层的阀芯、电刷镀NiW镀层的阀座组成的配对综合性能最好。 For the failure reasons of the ball valve, the valve core and the valve seat were respectively surface-treated by the plasma spraying technique and the brush plating technique, and the wear resistance of the valve core, the microhardness of the valve core coating, the bonding strength and the heat resistance Seismic performance was evaluated. The results show that the treated valve seat and seat wear resistance improved significantly; Among them, the plasma sprayed Al2O3-TiO2 cermet coating valve core, brush plating NiW coating valve seat composition of the best overall performance .