胡舸,孟惠民,刘俊友

• 1:北京科技大学新材料技术研究院
• 2:北京科技大学材料科学与工程学院

摘要(Abstract)：

利用超音频感应熔覆技术在Q235钢表面制备了厚度超过5.5 mm的镍基合金涂层,借助SEM/EDS、XRD、显微硬度计和球盘式摩擦磨损试验机研究了涂层微观组织结构、显微硬度分布及耐磨性能。结果表明,涂层主要由γ-Ni,γ-Ni/Ni3Si,硼化物Cr B和碳化物Cr7C3组成;涂层显微硬度呈现梯度分布,平均硬度为795 HV0.2,近4倍于基体硬度;涂层相对耐磨性能为基体的5.77倍;基体的磨损机制主要为严重的磨粒磨损,涂层的主要磨损机制为轻微粘着磨损,涂层中均匀分布大量的硬质相是耐磨性能显著提高的主要原因。

关键词(KeyWords)： 超音频感应熔覆;镍基合金涂层;显微硬度;耐磨性能

Abstract:

Keywords:

基金项目(Foundation): 北京市教育委员科学研究项目(00012087);; 国家973项目(2014CB643302)

作者(Author): 胡舸,孟惠民,刘俊友

DOI: 10.13289/j.issn.1009-6264.2014.s2.041

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