【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。更多还原

【Abstract】 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.更多还原