论文部分内容阅读
对YG8硬质合金试样进行强流脉冲电子束(HCPEB)表面辐照处理。利用扫描电镜和X射线衍射方法分析样品表层显微组织结构变化,测量基体及改性样品的表面显微硬度和耐磨性能。结果表明,随着脉冲次数增加,试样表面熔化程度增加,WC晶粒细化,形成了2μm的重熔层。表面改性层形成WC_(1-x)、Co_3W_9C_4相。经25次脉冲处理样品的表面显微硬度增加到2105 HK。磨痕深度较基体降低约86%,磨损率降至17.9 mm~3·min~(-1),约为基体试样的48%。
YG8 cemented carbide specimens were subjected to high-intensity pulsed electron beam (HCPEB) surface irradiation. The microstructure and microstructure of the samples were analyzed by scanning electron microscopy and X-ray diffraction. The surface microhardness and wear resistance of the samples were measured. The results show that as the pulse times increase, the degree of surface melting increases and the WC grains become thinner, forming a 2μm remelt layer. The surface modification layer forms WC_ (1-x) and Co_3W_9C_4 phases. The surface microhardness of the sample after 25 pulse treatments increased to 2105 HK. Wear scar depth of about 86% lower than the substrate, the wear rate dropped to 17.9 mm ~ 3 · min ~ (-1), about 48% of the substrate sample.