高速电弧喷涂FeCrAl涂层组织结构及抗高温氧化性能研究  

Study on Microstructure and Oxidation Resistance Properties at Elevated Temperature of FeCrAl Coatings Produced by High Velocity Arc Spraying

作　　者：王学[1] 张晋丽[2] 周汉湘[3] 苗卡沙[1] 

机构地区：[1]武汉大学,武汉430072 [2]保定热电厂,河北保定071051 [3]中南民族大学,武汉430074

出　　处：《航空材料学报》2006年第3期75-78,共4页Journal of Aeronautical Materials

摘　　要：用高速电弧喷涂技术(HVAS)制备FeCrA l涂层,测试涂层在800℃的氧化性能,研究涂层在喷涂态和氧化后的组织结构。结果表明,由于冷却速率极快,FeCrA l涂层中形成比较多的Fe-Cr非晶态相,还有少量的Cr1.3Fe0.7O3和体心立方晶格的Fe-Cr固溶体,喷涂过程中A l的氧化比较严重。FeCrA l涂层的抗高温氧化性明显高于12Cr1MoV钢,接近于T91钢,涂层具有优异的抗氧化性一方面是由于层片间形成保护性的Cr氧化膜,阻止进一步氧化,也与含有较多抗氧化性好的非晶态相有关。高温氧化后,涂层中部分非晶态相晶化,转变为Fe-Cr晶体相。FeCrAl coatings were prepared on low carbon steel substrate by high velocity arc spraying(HVAS)technology.The oxidation performance of coatings at elevated temperature was tested,microstructures of the sprayed and oxidized coatings were investigated.Results indicated that the as-sprayed coating was consisted of Fe-Cr amorphization mainly,together with crystallic phases such as Cr_(1.3)-Fe_(0.7) O_3 and Fe-Cr solution crystals,which could be concluded that a very high cooling rate was obtained during HVAS pr...

关 键 词：高速电弧喷涂 FeCrAl涂层 高温氧化 组织结构 

分 类 号：TG174.44[金属学及工艺—金属表面处理]