中文摘要：

为了改善涂层的组织和性能，对超音速等离子喷涂技术制备的高铝青铜涂层进行高频感应重熔处理，研究重熔后涂层的微观组织结构特征和界面结合状态.感应重熔前涂层具有层流状组织特点，含有少量氧化渣、孔隙及未完全熔融颗粒，涂层与基体间以机械结合为主.感应重熔能消除未熔颗粒和夹杂，使组织致密、均匀，组织的层流特征弱化，孔隙率有所下降.基体元素和涂层元素相互扩散，在界面形成一条明显的白亮带，呈冶金结合状态，结合牢固，涂层的结合性能有所改善.重熔后扩散带和涂层表面的硬度较高，界面结合强度也由重熔前的25.110提升至83.358 MPa.

英文摘要：

To improve the microstructure and properties of high-aluminum bronze coatings prepared by supersonic plasma spra-ying, the coatings were remelted with a high-frequency induction system. The microstructure characteristics and interface bonding state of the coatings were studied by metallurgical microscopy, scanning electron microscopy, X-ray diffraction, energy dispersion analysis, porosity measurement, microhardness testing and mechanical strength testing. It is indicated that laminar structure characteristics and a small amount of oxidation slag, pores and incompletely melted particles exist in the coating before remelting. Mechanical combination is the main way to join the matrix and the coating. Incompletely melted particles and laminar structure characteristics are lessened in the coating after remelting. The porosity of the coating after remelting is lower than before remelting. A white metallurgical band forms in the interface because of element diffusion between the matrix and the coating, which would enhance the adhesion. A higher hardness is observed in both the diffusion zone and the surface of the remelting coating, and the interfacial bonding strength increases from 25.110 before remelting to 83.358 MPa after remelting.