摘 要:为解决火电厂锅炉水冷壁热腐蚀问题,采用高速火焰喷涂技术首次制备出Fe-Al/SiC复合涂层,并对涂层的结合强度、显微硬度、抗热震性能和耐热腐蚀性能进行了研究.结果表明:Fe-Al/SiC复合涂层基体为Fe-Al相(Fe3Al、FeAl),SiC硬质相分布于涂层之中,与基体结合良好.整个涂层组织致密,呈现典型层状特征,具有较高的结合强度和显微硬度,孔隙率低,具有优异的抗热震性能和耐热腐蚀能力.经过150h涂盐热腐蚀后,Fe-Al/SiC复合涂层的腐蚀增重只有20号钢的30%左右.涂层材料成本低廉,便于现场使用,应用前景广阔.
关键词:高速火焰喷涂(HVFS);Fe-Al/SiC复合涂层;热腐蚀;抗热震性能;
分类号:TK223.3+1 文献标识码:A
文章编号:1004-9649(2007)04-0037-05
Research on the performance of new-type protective coating on water-wall tubes for thermal power plant
LIU Shuang XU Run-sheng LIU Xiao-ming
基金项目:国家自然科学基金资助项目(50235030)
作者简介:刘爽(1982-),男,山东淄博人,硕士研究生,从事高速火焰喷涂Fe-Al复合涂层性能研究.E-mail:gigihou@sina.com
作者单位:刘爽(内蒙古工业大学,材料科学与工程学院,内蒙古,呼和浩特,010051)
徐润生(内蒙古电力科学研究院,内蒙古,呼和浩特,010021)
刘晓明(内蒙古电力科学研究院,内蒙古,呼和浩特,010021)
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