李明喜,刘进,李殿凯

• 1:安徽工业大学材料科学与工程学院

摘要(Abstract)：

采用等离子喷焊技术在Q235钢表面制备了铁基合金涂层,采用光学显微镜(OM)、扫描电镜(SEM)、X射线衍射(XRD)以及销盘磨损实验,研究了VC加入量对铁基合金喷焊层组织和耐磨性能的影响。结果表明:未加VC的铁基合金喷焊层主要由α-Fe,γ-Fe和(Cr,Fe)7C3组成;加入2.0%VC时,γ-Fe相消失;当VC的加入量达10%时,γ-Fe相又出现,且出现了VC相;VC作为异质形核基底,促进了形核,细化晶粒,并改变了共晶组织形貌,提高了喷焊层的硬度和耐磨性能。未加VC时,喷焊层的耐磨机理主要为疲劳剥落,加入VC以后,喷焊层的疲劳剥落逐渐减弱并出现犁沟。

关键词(KeyWords)： 等离子弧喷焊;碳化钒;铁基合金;耐磨性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51445005);; 安徽省科技攻关项目(1501021069)

作者(Author): 李明喜,刘进,李殿凯

DOI: 10.13289/j.issn.1009-6264.2015.11.036

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