制备高性能表面耐磨涂层是抵抗工件磨损的有效途径.利用自行研制的电热爆炸超高速喷涂装置,进行了在大气环境下制备WC-Co硬质合金抗磨涂层的试验研究.分析了WC-Co金属陶瓷箔爆炸过程的电学变化特性,不同电压等级下的试验结果表明:爆炸箔的平均能量利用率约为30%,得到了亚微米级的超细晶涂层;涂层的平均显微硬度为原始喷涂材料硬度的1.1～1.5倍,最高可达2 220 HV;在涂层与基体结合面处形成了不同于涂层和基体组织的过渡层;晶粒直径最小可达70 nm,平均晶粒度级别数G=20.8.
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