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OALib Journal期刊
ISSN: 2333-9721
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类表面织构化镍基复合涂层的摩擦磨损性能
Keywords: 材料失效与保护,镍基复合涂层,真空熔覆,类织构,wc
Abstract:
？在低碳钢表面添加质量分数为20%的wc和6%的石墨颗粒,采用真空熔覆方法制备出具有类织构切面形貌的镍基合金(ni0)复合涂层,研究了复合涂层的显微组织形貌及形成机理、相组成以及干摩擦条件下的摩擦磨损性能,并与镍基合金(ni0)、碳化钨增强镍基合金(ni0+20%wc)、石墨改性镍基合金(ni0+6%石墨)三种涂层进行了比较。结果表明,wc呈不连续的三维网状分布在镍基合金基体中,镍基合金主要由基体相γ-ni,铬化物硬质相crb、cr7c3、cr23c6和共晶相ni3b、ni3si构成;wc和石墨的单独加入都能提高复合涂层的摩擦磨损性能,类织构组织复合熔覆层的摩擦磨损性能优于相同组成的硬质颗粒单独弥散分布的复合熔覆层;在wc和镍基合金基体组成的类织构形貌结构和石墨润滑相的共同影响下,复合涂层比单一镍基合金涂层的耐磨性提高大约9.6倍。
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