王珂,崔洪芝,魏娜,张艳凤,王淑峰,程贵勤

• 1:山东科技大学材料科学与工程学院
• 2:青州海盾液压机械有限公司

摘要(Abstract)：

以Ti、Fe、B4C为初始粉末,采用等离子熔覆的方法,在Q235低碳钢表面获得了Fe基Ti B2长条、Ti C颗粒等多尺度强化相的陶瓷涂层,并分析了涂层的物相组成、组织结构、显微硬度,探讨了物相、组织结构的形成过程。结果表明,涂层主要物相为Ti B2、Ti C、Fe2B、Fe3(C,B)和α-Fe,其中Ti B2主要为长条状,长度为60~74μm,少部分呈近六边形块状,尺寸为4~5μm,而Ti C主要是不规则的多边形细小颗粒,尺寸2~3μm,均匀地分散在涂层中,还有部分Ti C呈枝晶状;涂层与基体之间存在过渡层,涂层与基体之间结合紧密,呈冶金结合;随着等离子束电流的增加,长条状的Ti B2数量减少而近六边形的块状Ti B2数量增加,Ti C枝晶生长更加充分。因Ti B2长条和细小的Ti C颗粒共存,对涂层起到多尺度复合强化作用。

关键词(KeyWords)： 等离子熔覆;TiB2+TiC;多尺度增强;复合涂层

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51272141);; 山东省“泰山学者”计划(ts20110828);; 国家863计划项目(2015AA034404)

作者(Author): 王珂,崔洪芝,魏娜,张艳凤,王淑峰,程贵勤

DOI: 10.13289/j.issn.1009-6264.2015.06.034

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