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在Q235钢基体上采用等离子弧熔覆法制备了Co Cr Cu Fe Mn Ni高熵合金涂层。采用SEM、EDS、XRD等研究了涂层的组织,利用显微硬度计测试了涂层的显微硬度分布。结果表明,采用等离子熔覆等摩尔Co、Cr、Cu、Fe、Mn、Ni单质金属混合粉,形成了无裂纹、无气孔缺陷,与基体冶金结合的高熵合金涂层。涂层厚度约为1 mm,主要由FCC1固溶体枝晶和少量枝晶间组织组成,枝晶间为BCC、FCC2相。涂层的显微硬度大约为260~390 HV0.2,明显高于基体的硬度(150~180 HV0.2)。
Co Cr Cu Fe Mn Ni high-entropy alloy coating was prepared on Q235 steel substrate by plasma arc cladding method. The microstructure of the coating was studied by SEM, EDS, XRD and so on. The microhardness distribution of the coating was tested by microhardness tester. The results show that the high entropy alloy coating with no cracks and no porosity defects and metallurgical bond with the substrate is formed by plasma cladding of equimolar Co, Cr, Cu, Fe, Mn and Ni single metal powders. The thickness of the coating is about 1 mm, mainly composed of FCC1 solid solution dendrite and a small amount of interdendritic structure, dendrite BCC, FCC2 phase. The microhardness of the coating is about 260 ~ 390 HV0.2, which is obviously higher than the hardness of the matrix (150 ~ 180 HV0.2).