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张欣, 王泽华, 林尽染, 张旋. 高速电弧喷涂FeCrBSiMo涂层抗高温氧化性能[J]. 焊接学报, 2014, 35(12): 19-22.
引用本文: 张欣, 王泽华, 林尽染, 张旋. 高速电弧喷涂FeCrBSiMo涂层抗高温氧化性能[J]. 焊接学报, 2014, 35(12): 19-22.
shu
ZHANG Xin, WANG Zehua, LIN Jinran, ZHANG Xuan. High temperature oxidation of high velocity arc sprayed FeCrBSiMo coating[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2014, 35(12): 19-22.
Citation: ZHANG Xin, WANG Zehua, LIN Jinran, ZHANG Xuan. High temperature oxidation of high velocity arc sprayed FeCrBSiMo coating[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2014, 35(12): 19-22.
shu

高速电弧喷涂FeCrBSiMo涂层抗高温氧化性能

High temperature oxidation of high velocity arc sprayed FeCrBSiMo coating

    摘要
  • 摘要: 采用高速电弧喷涂工艺在20钢基体上制备铁基FeCrBSiMo涂层,孔隙率为3.64%,显微维氏硬度为9 002.5 MPa,结合强度达52 MPa;采用扫描电镜、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,并与锅炉管道常用20钢的相关性能进行了比较.结果表明,FeCrBSiMo涂层组织结构致密,在450~750℃下氧化80 h后其氧化增重均明显低于锅炉管道用20钢增重,其中750℃时的氧化增重仅是20钢的1/25.高温氧化时,涂层表面生成连续致密的铁,铬氧化物膜,能阻碍O元素从涂层表面扩散渗入涂层内部,防止涂层的进一步氧化,具有很好的保护性.

     

    Abstract: The FeCrBSiMo coating was fabricated on cylindrical AISI 20 steel substrate by high velocity arc spraying process. The coating with porosity of 3.64%,microhardness of 918HV0.1 and bond strength of 52MPa was manufactured. The high temperature oxidation performance was studied by means of scanning electron microscopy (SEM),energy-dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD) and compared with AISI 20 steel. The results indicated that the FeCrNiBSiMo coating had an excellent high temperature oxidation performance that is much better than AISI 20 steel. The weight gain of the coating was only 1/25 of AISI 20 steel after oxidization at 750℃ for 80 h. The compact oxide film consisting of iron oxide and chromium oxide formed on the surface of the coating can baffle the oxygen diffusion that protects the coating from further oxidation.

     

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