高硬度耐磨损电弧喷涂涂层研究  

Research of High Hardness and Wear Resistance Arc Sprayed Coatings

作　　者：方建筠[1] 秦颢 栗卓新[1] 蒋建敏[1] 史耀武[1] 

机构地区：[1]北京工业大学材料科学与工程学院,北京100022 [2]北京金达吴金属表面技术有限责任公司,北京100080

出　　处：《材料工程》2008年第2期27-30,共4页Journal of Materials Engineering

基　　金：国家自然科学基金资助项目(50375004);北京市自然科学基金资助项目(2052006)

摘　　要：采用电弧喷涂方法制备的高硬度耐磨损JCW-B涂层可广泛应用于工业零部件耐磨表面。对涂层的组织、孔隙率、硬度、结合强度及耐磨粒磨损性能进行分析,对比研究该涂层与Ni60喷熔层的耐冲蚀性能。结果表明JCW-B涂层组织致密,孔隙率低于4%,显微硬度HV0.1高于1200,平均结合强度大于50MPa。研究了涂层的耐磨损机理,XRD结果显示涂层中主要含有Fe3B硬质相,对涂层起到弥散强化的作用。High hardness and wear resistance coating JCW-B were deposited via arc spraying. The microstructure, porosity, hardness, bond strength and abrasion behavior of JCW-B coating was analyzed, the erosion resistance properties of coating was compared with Arc Spray Welded Ni60 coating. Results showed that JCW-B coating exhibited dense microstructure, low porosity, high hardness, high bond strength and excellent abrasive and erosive wear resistance. XRD spectrum of the coatings indicates that Fe3B was contained as the main hard phase, which dispersedly strengthens the coatings. Moreover, some Fe2O3 ,FeO were also formed during the spraying process. It was concluded that FeB3 randomly distributed in the microstructure of coating act as hard phase promoting wear properties.

关 键 词：JCW-B涂层 高硬度 Fe3B 弥散强化 耐磨损 

分 类 号：TG174.44[金属学及工艺—金属表面处理]