王佳峰,崔洪芝,毕文彪,张新杰,王明亮

• 1:山东科技大学材料科学与工程学院

摘要(Abstract)：

采用SPS烧结工艺,以W、Fe和Fe-B合金粉为原料,在Q235基板表面制备FeWB涂层,并在不同电流下对预制的涂层进行重熔处理。借助X射线衍射仪、扫描电镜、显微硬度计和磨损试验机分析了FeWB涂层的显微组织结构、显微硬度和耐磨性。结果表明:未重熔SPS烧结涂层与Q235基板呈机械结合,涂层中存在大量的原料W及部分中间产物W2B、Fe7W6,只有少量FeWB生成,且组织偏聚严重、孔隙较多,导致其显微硬度较低且不均匀,耐磨性较差;经低电流(30 A)重熔,部分原料进一步转化为FeWB,缺陷有所减少;随着重熔电流增加(40 A和50 A),涂层与Q235基板结合界面形成结合紧密的过渡层,呈冶金结合,原料基本完全转化为FeWB,并呈块状均匀分布在α-Fe基体中,组织结构更加致密,表现出较高的显微硬度,耐磨性显著增强,尤其40 A电流下重熔涂层表现出更加优异的耐磨性,其磨损量仅为未重熔SPS烧结涂层的17.4%。

关键词(KeyWords)： SPS烧结;等离子重熔;FeWB涂层;耐磨性

Abstract:

Keywords:

基金项目(Foundation): 国家高技术研究发展计划(863计划)项目(2015AA034404);; 国家自然科学基金(51772176);; 泰山学者攀登计划(tspd20161006)

作者(Author): 王佳峰,崔洪芝,毕文彪,张新杰,王明亮

DOI: 10.13289/j.issn.1009-6264.2018-0026

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