FeNiCrAl涂层是一种用作轴类零部件的表面耐磨防护材料,为深入研究高速电弧喷涂工艺对FeNiCrAl涂层性能的影响机理,对不同喷涂参数下制备的涂层的组织结构、结合强度、物相组成和显微硬度等性能进行分析表征,探究“喷涂电流-涂层组织结构-结合强度”之间的关系。结果表明：喷涂电流对涂层的组织致密性及结合强度影响较大；喷涂电流200 A、电压34 V、喷涂距离160 mm的工艺参数下制备的FeNiCrAl涂层组织致密,孔隙率约8.76%,结合强度52.3 MPa,涂层硬度约626 HV0.1,约为基体硬度的1.6倍；影响机理与Fe-Al金属间化合物和Cr0.19 Fe0.1 Ni0.11固溶体在涂层内部均匀弥散分布有关。%FeNiCrAl coating is a kind of surface wear resistant material for shaft parts. Microstructure, adhesive strength, phase com-position and microhardness were analyzed in order to study the influence mechanism of spraying parameters on coating properties. The relation among the spraying current, coating microstructure and cohesive strength was studied in detail. The results shown that the spra-ying current is very important to obtain the dense coating (porosity of 8. 76 %) with cohesive strength of 52. 3 MPa and an excellent coating is prepared by spraying current 200 A, spraying voltage 34 V and spraying distance 160 mm. The hardness of coating is 626 HV0. 1 and about 1. 6 times as that of the matrix. The effective mechanism is relevant to the scatter distribution of the Fe-Al intermetallic compound and Cr0. 19 Fe0. 1 Ni0. 11 solution in the coating.
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