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采用高速电弧喷涂工艺在20钢基体上制备铁基FeCrNiNbBSiMo涂层,采用光学显微镜、扫描电镜、能谱分析仪和X射线衍射仪对涂层的显微组织和抗高温氧化性能进行了研究,并与FeCrNiBSiMo涂层和锅炉管常用材料20钢的相关性能进行了比较。结果表明:FeCrNiNbBSiMo涂层的抗高温氧化性能明显优于FeCrNiBSiMo涂层和20钢,其氧化增重分别为FeCrNiBSiMo涂层和20钢的79%和1/30。Nb的加入使涂层更为致密,表现出优秀的抗高温氧化性能。
Iron-based FeCrNiNbBSiMo coatings were prepared on 20 steel substrates by high speed arc spraying. The microstructure and high temperature oxidation resistance of the coatings were studied by optical microscope, scanning electron microscopy, energy dispersive spectroscopy and X-ray diffraction. The correlation performance with FeCrNiBSiMo coating and boiler tube 20 steel was compared. The results show that the oxidation resistance of FeCrNiNbBSiMo coating is obviously better than that of FeCrNiBSiMo coating and 20 steel. The oxidation weight gain of FeCrNiNbBSiMo coating is 79% and 1/30 of that of FeCrNiBSiMo coating and 20 steel respectively. Nb added to the coating more dense, showing excellent high temperature oxidation resistance.