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使用高速电弧喷涂技术在20钢样品表面制备了FeMnCrAl/Cr3C2涂层,采用光学显微镜、场发射扫描电镜、能谱分析和X射线衍射等方法,对FeMnCrAl/Cr3 C2涂层的显微组织和抗高温氧化性能进行了研究,并与电弧喷涂FeMnCr/Cr3 C2涂层、316L不锈钢涂层和20钢做了对比试验。研究结果表明:三种涂层增重均明显低于20钢;FeMnCrAl/Cr3C2涂层氧化增重约为FeMnCr/Cr3 C2涂层的1/3,略高于316L不锈钢涂层,FeMnCrAl/Cr3 C2涂层氧化后表面生成具有保护性的、致密的含Al氧化膜和Cr与Fe的复合氧化物,阻碍了涂层进一步氧化,但存在不均匀性,原因是电弧喷涂层成分的微观不均匀性和涂层中存在孔隙。
The FeMnCrAl / Cr3C2 coating was prepared on the surface of 20 steel by high speed arc spraying. The microstructure and resistance of the FeMnCrAl / Cr3 C2 coating were characterized by optical microscope, field emission scanning electron microscopy, energy dispersive spectroscopy and X-ray diffraction. High-temperature oxidation properties were studied and compared with the arc spraying FeMnCr / Cr3 C2 coating, 316L stainless steel coating and 20 steel. The results show that the weight gain of the three coatings is obviously lower than that of 20 steel; the oxidation weight gain of FeMnCrAl / Cr3C2 coatings is about 1/3 of that of FeMnCr / Cr3 C2 coatings, slightly higher than that of 316L stainless steel coatings, FeMnCrAl / Cr3 C2 The surface of the coating is oxidized to form a composite oxide with a protective and dense Al-containing oxide film and Cr and Fe, which hinders the further oxidation of the coating due to the non-uniformity of the micro-inhomogeneity of the composition of the arc sprayed coating And pores in the coating.