Ni对WC/钢基表面复合材料组织和界面的影响  

Effects of Nickel Powder on Microstructure and Interface of WC/steel Matrix Surface Composites

作　　者：隋育栋[1] 蒋业华[1] 李祖来[1] 周荣[1] 山泉[1] 

机构地区：[1]昆明理工大学材料科学与工程学院

出　　处：《特种铸造及有色合金》2011年第6期565-567,共3页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(50871048);云南省应用基金资助项目(2008E036M)

摘　　要：利用铸渗法制备了WC颗粒增强钢基表面复合材料,通过金相、扫描电镜等测试手段,重点研究了预制层中添加Ni粉对WC/钢基表面复合材料组织和界面的影响。结果表明,随着Ni添加量的增加,铸渗层中WC颗粒数目逐渐增多,复合层与基材的过渡趋于平缓,表面质量也趋于完好。同时,随着Ni添加量的增加,过渡层的变化逐渐趋向平缓,基体中马氏体、残余奥氏体及共晶碳化物的数量逐渐增加,并且复合层表层硬度呈现递增的趋势。WC particle reinforced steel matrix surface composites were successfully prepared by casting-infiltration method, and effects of nickel powder on microstructure and interface of WC/steel matrix surface composites were observed by OM （optical microscope） and SEM （scanning electron microscope） and EDS （energy dispersive spectrometer）. The results reveal that with increasing in nickel powder addition, WC particles in infiltrated layer are increased, which results in the smooth transition between composite layer and the matrix and the improvement of surface quality. In addition, with the increase of Ni powder addition, interface layer exhibits smooth change, and martensite, residual austenite as well as eutectic carbide in the matrix are increased gradually, resulting in the gradient increase of hardness of composite surface layer.

关 键 词：预制层 钢基表面复合材料 Ni粉 

分 类 号：TB331[一般工业技术—材料科学与工程] TG146.4[金属学及工艺—金属材料]