利用等离子喷涂技术在45钢表面制备铜合金涂层,并进行重熔处理。通过金相显微镜、X射线衍射仪等分析研究了重熔处理对45钢喷涂层组织性能的影响。结果表明,重熔处理使涂层组织更加均匀致密,增加了冶金结合的强度,并使得涂层及结合带附近的基体等硬度都得到大幅度提高。 Copper alloy coating was prepared on the surface of 45 steel by plasma spray technique and remelted. The effects of remelting treatment on microstructure and properties of 45 steel sprayed coatings were studied by metallographic microscope and X-ray diffraction. The results show that the remelting process makes the coating structure more uniform and compact, increases the strength of the metallurgical bonding, and greatly increases the hardness of the substrate and the substrate near the coating.