超音速火焰喷涂Ni基涂层组织与性能的研究  

Research of Microstructure and Properties of HVOF Ni-based Coatings

作　　者：李方坡[1] 王引真[1] 王纬[1] 

机构地区：[1]中国石油大学(华东)机电工程学院,东营257061

出　　处：《材料导报》2006年第8期155-157,共3页Materials Reports

基　　金：东营市科学技术发展计划项目(T050313)资助

摘　　要：采用超音速火焰喷涂技术(HVOF)制备了3种镍基涂层,并研究了涂层的显微组织和性能。结果表明:使用烧结粉末Ni60制备的涂层结合强度、显微硬度均高于包覆粉末Ni包C、Ni包MoS2制备的涂层,Ni包C涂层中产生大量的气体并含有许多的未熔软质相,使得其孔隙率最大,结合强度、显微硬度最低;镍在涂层中起粘结作用,镍含量的增加能显著提高涂层的结合强度和显微硬度;涂层中起减磨作用的MoS2和C相会明显降低涂层的结合强度。Three kinds of Ni-based coatings by high velocity oxygen fuel （HVOF） spraying are produced, and their microstructure and properties are researched. The results show that Ni60 coating has the highest bonding strength and micro-hardness, while Ni wrapped C coating has the lowest bonding strength and micro-hardness o（ these coatings because of plenty of porosity and no-melt phase; Ni in coatings is used to stick to other powders together,and the more the content o（ Ni is, the higher bonding strength and micro-hardness the coating has. However, MoS2 and C, which are soft phases to increase coatings＇ wearing and self-lubrication properties of coatings, greatly put down bonding strength and micro-hardness of coatings.

关 键 词：热喷涂 超音速火焰喷涂 NI基涂层 组织性能 

分 类 号：TG174.442[金属学及工艺—金属表面处理] TG174.44[金属学及工艺—金属学]