HVAF喷涂纳米结构Ni基涂层组织及磨损性能研究  

Investigation on Microstructure and Wear Properties of Nano-structured Ni-based Coating Prepared by HVAF Sprayed

作　　者：马光[1] 孙冬柏[2] 樊自拴[2] 

机构地区：[1]中国电力科学研究院电工与新材料研究所,北京100192 [2]北京科技大学腐蚀与防护中心,北京100083

出　　处：《热加工工艺》2012年第2期143-145,148,共4页Hot Working Technology

基　　金：北京市重大科技项目子项目(H020420050020)

摘　　要：利用AC-HAVF喷涂技术制备了纳米结构Ni基涂层,对涂层微观结构以及磨损性能进行研究。结果表明:涂层主要由γ-Ni固溶体以及FeNi3、Ni3B、CrB2、Cr26C3和Cr7C3等化合物组成,涂层主要由50～70 nm的纳米粒子组成,部分粒子达到20～30 nm;涂层与基体结合很好,孔隙率低,约为2.37%;涂层具有较好的耐磨性,涂层磨损以疲劳磨损为主。Nano-structured Ni-basesd coating was prepared using AC-HVAF spraying technology, the microstructure and wear properties of the coating were investigated. The results show that the coating consists of γ-Ni solid solution and FeNi3, Ni3B, CrB2,Cr26C3, Cr7C3 phases; the coating is well combined with the substrates, and its porosity rate is about 2.37%; the main particle sizes of the coating are 50-70nm, the parts can reach 20-30 nm; the coating has high hardness and good wear resistance. The main wear mechanism of the coating is fatigue wear.

关 键 词：AC-HVAF 纳米结构Ni基涂层 微观结构 磨损性能 

分 类 号：TG174[金属学及工艺—金属表面处理]