设计了FeCrAl、FeCrB两种Fe基粉芯丝材,采用XRD、OM、SEM、TEM、激光脉冲热常数测试仪、磨粒磨损试验机等对高速电弧喷涂层的微观组织结构、热导率、耐磨性进行表征,并与工程中常用的3Cr13喷涂层进行对比研究.结果表明,制备的喷涂层较致密,孔隙率低于3.3％.丝材中加入Al、B元素可有效减少涂层中氧化物的生成,而B元素具有更强的除氧效果.氧化物含量低的涂层具有较高的热导率,其中氧化物含量最低的FeCrB涂层室湿热导率达8.99 W·m-1·K-1.所设计的FeCrB涂层的显微硬度达到828.3 HV0.1,相对耐磨性为3Cr13涂层的3.7倍.
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