采用俄SE-5.01振动式电火花表面强化机,以金属Cr作为强化电极材料,以炮钢PCrN i3MoVA作为基体材料,研究了强化层的特征、硬度、回火硬度、耐磨性以及900℃的高温氧化行为.结果表明,强化层是冶金结合的梯度涂层,强化层硬度和耐磨性较基体有很大的提高,回火析出的硬质相使其具有很好的热硬性,900℃连续氧化100 h后,强化层表面只有局部存在Cr2O3保护膜. Using the Russian SE-5.01 vibrating surface-enhanced electric spark machine, metal Cr as the reinforcing electrode material, and the steel PCrN i3MoVA as the base material, the characteristics, hardness, tempering hardness, wear resistance and the wear resistance of the reinforced layer The results show that the strengthening layer is a metallurgical bonded gradient coating, the hardness and wear resistance of the strengthening layer are much higher than that of the matrix, and the hard phase is tempered to make it have good thermostibility, and 900 ℃ After continuous oxidation for 100 h, only Cr2O3 protective film exists locally on the surface of the strengthened layer.