高速电弧喷涂FeMnCrAl/Cr_3C_2涂层的组织及抗高温氧化性能  

Microstructure and high temperature oxidation resistance of FeMnCrAl/Cr_3C_2 coatings deposited by high velocity arc spraying

作　　者：罗来马[1,2] 罗娟[2] 刘少光 刘永莉[4] 郦剑[2] 

机构地区：[1]合肥工业大学材料科学与工程学院,安徽合肥230009 [2]浙江大学材料科学与工程系,浙江杭州310027 [3]温州科得力新特材料有限公司,浙江温州325029 [4]江苏科技大学材料科学与工程学院,江苏镇江212003

出　　处：《材料热处理学报》2010年第12期139-142,共4页Transactions of Materials and Heat Treatment

基　　金：浙江省科技厅面上项目(2009C31129)

摘　　要：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。FeMnCrAl/Cr3C2coating was deposited on AISI 20 steel substrate by high velocity arc spraying.The microstructure and high temperature oxidation resistance of FeMnCrAl/Cr3 C2 coating were studied by means of optical microscopy（OM）,field emission scanning electron microscopy（FE-SEM）,energy dispersion spectrum（EDS） analysis and X-ray diffraction（XRD）.The oxidation resistance of FeMnCrAl/Cr3 C2 coating was compared with that of FeMnCr/Cr3 C2 coating,316L stainless steel coating and AISI 20 steel.The results show that the three kinds of coatings obviously have better oxidation resistance than that of AISI 20 steel substrate.FeMnCrAl/Cr3 C2 coating exhibits a lower isothermal mass gain than FeMnCr/Cr3 C2 coating and similar to that of 316L stainless steel coating.The formation of compact oxide film containing aluminum and iron-chromium oxide in FeMnCrAl/Cr3 C2 coating is responsible for the protection of the coating from further oxidation,but the protective oxide films are not uniformly distributed due to micro-inhomogeneous composition of the as-sprayed coatings and pores in the coatings.

关 键 词：高速电弧喷涂 FeMnCrAl/Cr3C2涂层 抗高温氧化性能 

分 类 号：TG174.44[金属学及工艺—金属表面处理]