殷泽亮,崔洪芝,宋晓杰,李宝程,赵小凤

• 1:山东科技大学材料科学与工程学院
• 2:中国海洋大学材料科学与工程学院

摘要(Abstract)：

采用激光熔覆技术在Q235钢表面制备了WC陶瓷颗粒增强FeCrNiMo-WC多主元合金复合涂层。通过相组成分析、显微结构表征、力学性能测试和摩擦磨损实验等研究了WC含量对涂层组织和耐磨性能的影响。结果表明：涂层主要物相除了FCC+WC以外，还存在网状的共晶组织，由FCC与M_6C碳化物相呈层片状交替分布，片层间距约100 nm;随着WC含量的增加，共晶组织体积分数增加，涂层逐渐形成共晶组织+WC陶瓷颗粒的微观组织结构；WC陶瓷颗粒的加入显著提高了涂层的硬度和耐磨性，当WC含量为40 mass%时，涂层硬度为55.9 HRC,此时涂层耐磨性能最好，最小体积磨损率为2.17×10~(-5) mm~3/(N·m)。涂层中大颗粒WC以及软硬交替的FCC+M_6C共晶体，协同提高了涂层的硬度和强韧性。同时M_6C相具有减磨作用，使得涂层摩擦系数逐渐降低，磨损失效形式由粘着磨损向磨粒磨损过渡。

关键词(KeyWords)： 激光熔覆;多主元合金涂层;共晶组织;摩擦磨损

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51971121,U2106216);; 山东省重大创新工程项目(2019JZZY010303,2019JZZY010360)

作者(Author): 殷泽亮,崔洪芝,宋晓杰,李宝程,赵小凤

DOI: 10.13289/j.issn.1009-6264.2022-0504

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