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采用氧-煤油超音速火焰喷涂(HVOF)设备喷涂WC/Co粉末制备高抗磨损复合涂层,表征和分析了WC/Co涂层的微观组织结构、显微硬度、孔隙率和抗磨损性能,并探讨了涂层的摩擦磨损机理。结果表明:获得的WC/Co涂层的孔隙率为0.65%,平均显微硬度达1251.5 HV0.2,涂层抗磨损性能是基体ZG06Cr13Ni4Mo不锈钢的50倍以上。WC/Co涂层具有优良的抗磨损性能的根本原因在于涂层中WC的存在,它使得涂层的显微硬度得到大幅度提高,从而提高了涂层抗磨损的性能。
The WC / Co powder was sprayed on the HVOF equipment to prepare the high wear resistant composite coating. The microstructure, microhardness, porosity and wear resistance of the WC / Co coating were characterized and analyzed. The friction and wear mechanism of the coating was also discussed. The results show that the porosity of WC / Co coating is 0.65% and the average microhardness is 1251.5 HV0.2. The wear resistance of the coating is more than 50 times that of ZG06Cr13Ni4Mo stainless steel. WC / Co coating with excellent wear resistance is the root cause of the presence of WC in the coating, which makes the coating has a significant increase in microhardness, thereby enhancing the wear-resistant coating performance.