高振,杜晓东,蒋延涛,汪峰,周丹,沈健,刘光复

• 1:合肥工业大学材料科学与工程学院
• 2:徐州徐工筑路机械有限公司

摘要(Abstract)：

采用粉末埋入反应辅助涂覆技术处理后,SiC表面产生由TiC、Ti5Si3、Ti8C5等组成Ti预涂覆层。通过等离子喷焊技术将经上述预涂覆的SiC颗粒与铁基合金熔覆于工件表面,制备SiC增强铁基合金复合涂层。结果表明:Ti涂覆SiC颗粒增强涂层内颗粒得到保留,受高温作用会发生一定分解,分解产物改变了基体的成分,进而影响基体的结晶模式和组织形态,出现了树枝晶和多边形块状碳化物。Ti涂覆SiC颗粒的颗粒增强作用以及分解产物的产生弥散强化和固溶强化作用,使得复合涂层的平均硬度高于纯铁基涂层,表面的维氏硬度值最高可达961 HV0.2,但SiC颗粒在基体中分布稀疏,颗粒增强效果不明显。

关键词(KeyWords)： 预涂覆;显微组织;界面反应;显微硬度

Abstract:

Keywords:

基金项目(Foundation): 国家重点基础研究计划(973)项目(2011CB013402);; 安徽省教育厅自然科学重点项目(KJ2012A232)

作者(Author): 高振,杜晓东,蒋延涛,汪峰,周丹,沈健,刘光复

DOI: 10.13289/j.issn.1009-6264.2014.09.031

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