强流脉冲电子束辐照YG8硬质合金的组织与性能  

Microstructure and properties of YG8 hard alloy after high current pulsed electron beam irradiation

作　　者：郝胜智[1,2] 徐洋[3] 贺冬云[2] 董闯[1,3] 

机构地区：[1]三束材料改性教育部重点实验室(大连理工大学),辽宁大连116024 [2]大连理工大学物理与光电工程学院,辽宁大连116024 [3]大连理工大学材料科学与工程学院,辽宁大连116024

出　　处：《金属热处理》2011年第3期68-71,共4页Heat Treatment of Metals

基　　金：国家自然科学基金(11075028);中央高校基本科研业务专项资金(DUT10LK07)

摘　　要：采用强流脉冲电子束(HCPEB)表面改性技术对YG8硬质合金表面进行辐照处理试验。利用金相显微镜、X射线衍射仪和扫描电镜对处理样品的表层组织进行分析,测量改性样品的显微硬度和摩擦磨损性能指标。结果表明,强流脉冲电子束处理使YG8样品表层重熔平整,WC颗粒形状圆整并与粘结剂Co基体发生溶解扩散,表层显微硬度增加到3523.6 HK,耐磨性提高约19%。High current pulsed electron beam（HCPEB） surface modification technique was used for treating YG8 hard alloy sample.The microstructure in surface layer of the modified sample was analyzed by optical microscopy,X-ray diffractometer and scanning electron microscopy.The mechanical properties of the modified sample were measured by microhardness and friction wear test machines.The results show that the HCPEB irradiation leads to the melting and smoothing of YG8 alloy sample surface.The WC particles change to be rounder and dissolve into the Co bonding base.The surface microhardness of YG8 alloy increases to 3523.6 HK after treating by HCPEB and the wear resistance is improved about 19%.

关 键 词：强流脉冲电子束 表面改性 YG8硬质合金 显微组织 耐磨性 

分 类 号：TG17[金属学及工艺—金属表面处理]