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 intensity pulsed electron beam (HCPEB) surface modification technology was used to irradiate the surface of YG8 cemented carbide. The microstructure of the treated samples was analyzed by metallographic microscope, X-ray diffraction and scanning electron microscopy. The microhardness and friction and wear properties of the modified samples were measured. The results show that the surface of YG8 sample is remelted by high current pulsed electron beam. The shape of WC grains is round and dissolves and diffused with the binder Co matrix. The microhardness of the surface layer increases to 3523.6 HK and the wear resistance increases about 19%.