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运用超音速等离子喷涂(S-APS)技术在45号钢基体表面制备多元铝青铜合金粉体涂层,为了改善结合性能,对涂层进行感应重熔处理。用XRD、SEM、EPMA分析Fe、Co、Ni、Mn等4种元素在感应重熔过程中的扩散行为。结果表明,基体中Fe在涂层中扩散距离很短;Co易固溶于Fe由涂层向基体扩散;Ni伴随Cu自涂层向基体转移;Mn向结合带处的扩散缓慢。Fe、Co以Fe3Co7等形式富集于灰色相中;Ni以NiCu、AlNi形式富集于灰色相中,Ni替代Cu形成AlNi2Mn,使Ni整体分布均匀;Mn以AlNi2Mn形式均布于涂层中。
Multi-element aluminum bronze alloy powder coating was prepared on the surface of steel substrate No.4 by supersonic plasma spraying (S-APS) technique. In order to improve the bonding property, the coating was remelted by induction. The diffusion behavior of four elements Fe, Co, Ni, Mn during induction remelting was analyzed by XRD, SEM and EPMA. The results show that the diffusion distance of Fe in the matrix is very short, Co is easy to dissolve in Fe and diffused from the coating to the matrix, Ni migrates from the coating to the matrix, and the diffusion of Mn to the bonding zone is slow. Fe and Co are enriched in gray phase in the form of Fe3Co7, Ni is enriched in gray phase in the form of NiCu and AlNi, AlNi2Mn is replaced by Ni instead of Ni, and the Ni is uniformly distributed in the coating. Mn is uniformly distributed in the coating in the form of AlNi2Mn.