在40Cr基材上利用氧-乙炔火焰喷涂镍基碳化钨(Ni60-WC)复合涂层后,对涂层进行电接触强化。通过金相显微镜观察电接触强化前后涂层截面的显微组织形貌,利用维氏显微硬度仪分析涂层截面的显微硬度分布,并通过SEM面扫描分析涂层与基材的钨元素分布。结果表明,电接触强化工艺能够显著提高涂层质量及硬度,并使涂层与基材间形成良好的冶金结合。 After 40Cr substrate using oxygen - acetylene flame sprayed nickel-based tungsten carbide (Ni60-WC) composite coating, the coating is subjected to electrical contact strengthening. The microstructure of the coating cross-section before and after the electrical contact was observed by optical microscope. The microhardness distribution of the coating cross-section was analyzed by Vickers microhardness tester. distributed. The results show that the electrical contact strengthening process can significantly improve the coating quality and hardness, and the coating and the substrate to form a good metallurgical bond.