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超音速火焰（ＨＶＯＦ）喷涂界面结合强度因喷涂材料和衬底材料的变化而异，本文通过对几种不同材料的ＨＶＯＦ喷涂界面微结构的研究揭示了影响喷涂界面结合强度的微观结构本质。本工作采用拉伸和剪切法测定了Ｎｉ／Ｃｕ，Ｎｉ／Ｔｉ，ＷＣ＋Ｃｏ／Ｔｉ，ＷＣ＋Ｃｏ／６０Ｓｉ２Ｍｎ，ＷＣ＋Ｃｏ／４５钢等ＨＶＯＦ喷涂界面的结合强度，利用扫描电子显微术（ＳＥＭ）、透射电子显微术（ＴＥＭ）、Ｘ射线能量散射谱（ＥＤＳ）和高分辨电子显微术（ＨＲＥＭ）对涂层、衬底以及喷涂界面的微结构、微成分特征进行了观察和分析，揭示出影响喷涂界面结合强度的主要结构因素是界面的非晶化和界面区的强变形、应力集中和微裂纹扩展，通过适当的工艺处理改善界面区组织结构将是提高界面结合性能的重要途径
The bonding strength of the HVOF coating interface varies with the material of the coating and the material of the substrate. In this paper, the micro-structure of the HVOF coating interface of several different materials is studied to reveal the microstructure nature of the bonding strength of the coating. In this work, the bonding strength of HVOF sprayed interface such as Ni / Cu, Ni / Ti, WC + Co / Ti, WC + Co / 60Si2Mn and WC + Co / 45 steel were measured by the tensile and shear methods. The scanning electron microscopy (SEM) The microstructure and micro-component characteristics of the coating, the substrate and the sprayed interface were observed and analyzed by TEM, EDS and HREM. The main structural factors that affect the bonding strength of the sprayed interface are the interface amorphization and the strong deformity of the interface region, stress concentration and micro-crack propagation. Improving the interface structure by appropriate process will be an important way to improve the interface bonding performance