魏建勋,贺定勇,周正,姚海华,蒋建敏

• 1:北京工业大学材料科学与工程学院

摘要(Abstract)：

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涂层室温热导率达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。

关键词(KeyWords)： Fe基粉芯丝材;高速电弧喷涂;热导率;耐磨性

Abstract:

Keywords:

基金项目(Foundation): 北京工业大学先进技术基金项目(009000514312004)

作者(Author): 魏建勋,贺定勇,周正,姚海华,蒋建敏

DOI: 10.13289/j.issn.1009-6264.2014.s1.042

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