【作者】 靳春光；

【导师】 唐贵基； 黄保海；

【作者基本信息】 华北电力大学（河北） ， 机械工程， 2006， 硕士

【摘要】 锅炉磨损是发电企业最重要的问题之一。电弧超音速喷涂技术（HVAS）可以有效的解决此问题。其机理是在设备上喷涂FeCrAl涂层,增加其高温耐蚀性能和耐磨性能。本文分析了电弧超音速喷涂层的微观结构,研究了涂层的结合强度、抗高温腐蚀性能和热震性能。超音速喷涂的粒子速度决定冲击基体的压力大小,提高喷涂粒子的速度可以使粒子与基体结合的更加紧密。涂层的显微组织呈典型的层状结构特征,组织致密,颗粒间有很薄的氧化物膜和少量气孔。研究表明,FeCrAl涂层比45号钢的抗高温腐蚀性能更出色。FeCrAl涂层低温热腐蚀形成疏松的Fe₂O₃是其腐蚀的主要原因。更多还原

【Abstract】 The efficient solution of the furnace damage is one of the most important problems. The supersonic velocity electric arc spraying technology （HVAS） has gained satisfactory solution. HVAS produces FeCrAl-coating on the structural materials to enhance its high-temperature corrosion resistance and wear-resistant features. The microstructures of the FeCrAl coating, the bondstrength, high-temperature corrosion resistance, thermal shock resistance and porosity of coatings produced by HVAS have been studied. The HVAS particle speed decides the impact basal body pressure. The increased particle speed makes the combination of the particle and the basal more concrete. The light microscope is used to analyze the microstructure of the Feral coating produced by HVAS. The microscopic structure of coatings appears typical layered structure characteristics. The coatings have high density and very thin oxide films and a small quantity of gas porosity. The study indicates that corrosion resistance of FeCrAl coating by HVAS is better than that of 45# steel. The loose Fe₂O₃ formed in low-temperature hot corrosion of FeCrAl coating is the main reason of the corrosion.更多还原