感应熔覆Mo_2FeB_2/Fe耐磨涂层的组织与性能研究  

STUDY ON MICROSTRUCTURE AND PROPERTIES Mo_2FeB_2/Fe WEAR-RESISTANT COATING BY INDUCTION CLADDING

作　　者：屈彦杰[1] 郭志猛[1] 刘祥庆[1] 曾鲜[1] 陈文 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]莱芜市粉末冶金先进制造重点实验室,山东271100

出　　处：《粉末冶金工业》2013年第4期27-32,共6页Powder Metallurgy Industry

基　　金：国家自然科学基金委员会资助(No.50774010);广东省产学研结合项目"微(纳)米级晶粒硬质合金制品研发及产业化"(2009A090100014)

摘　　要：本文采用真空反应烧结合成出Mo2FeB2硬质颗粒,并采用感应熔覆技术在钢基体表面成功制备出以Mo2FeB2为强化相的硬质涂层,并对其组织结构、界面相容性和耐磨性进行了研究。结果表明,在1 350℃真空烧结30min所制得Mo2FeB2硬质相颗粒分布均匀致密且硬度高;感应熔覆Mo2FeB2/Fe涂层的硬质相最佳含量为50%质量分数,涂层组织分布均匀孔洞较少,硬度高达65.5HRC,涂层与基体结合良好。磨损试验表明,Mo2FeB2强化层具有比YG8硬质合金更好的耐磨性。In this paper, Mo2 FeB2 hard phase particles were prepared by liquid phase sintering in vacuum, and then the hard coating of Mo2 FeB2 strengthening phase was prepared by induction heating in the surface of the steel substrate. The resulting organizational structure, interface compatibility and abrasive resistance of the material were studied. The results showed that Mo2FeB2 hard phase particles obtained in the vacuum sintering of 1 350℃ for 30 min distributed uniformly with high hardness, optimum content of the hard phase of Mo2FeB2/Fe coating by induction cladding was 50 （wt）%. The coating had uniform structure and few hole, and the hardness was up to 65.5 HRC. The coating and the substrate combined well. The wearing test indicated that the Mo2FeB2 hardening layer lead to better abrasive resistance than YG8 hard carbide.

关 键 词：Mo2FeB2三元硼化物 感应熔覆 涂层 

分 类 号：TG174.44[金属学及工艺—金属表面处理]