WC和Mo_2C添加对Ti(C,N)基金属陶瓷切削性能的影响  

Research on Cutting Performance of Ti(C,N)-based Cermets with WC and Mo_2C Addition

作　　者：吴悦梅[1] 熊计[1] 陈云[2] 郭智兴[1] 范洪远[1] 

机构地区：[1]四川大学制造科学与工程学院,四川成都610065 [2]成都工具研究所,四川成都610051

出　　处：《四川大学学报（工程科学版）》2011年第4期220-226,共7页Journal of Sichuan University (Engineering Science Edition)

基　　金：科技部科技人员服务企业行动计划资助项目(2009GJF00030);国家自然科学基金资助项目(50874076)

摘　　要：传统的Ti(C,N)基金属陶瓷刀具材料广泛采用Mo2C来改善粘结相对硬质相的润湿性,近年来Mo的价格不断上涨,寻找低成本金属代替Mo已成为Ti(C,N)基金属陶瓷的发展趋势。为了探讨WC代替Mo2C添加的可行性及其效果,研究了WC和Mo2C添加对Ti(C,N)基金属陶瓷切削性能的影响,采用电子扫描显微镜(SEM)观察刀具的磨损形貌,通过能谱分析(EDS)分析磨损表面的元素分布,并对刀具的主要磨损机理进行分析。实验结果表明,添加WC的金属陶瓷的切削长度和添加Mo2C的相当,将原始WC粉末粒度细化后,不仅切削长度显著增加,切屑也由带状缠乱型变为螺旋型,并且大大减少积屑瘤的形成,有利于切削的进行。切削磨损机理主要为扩散磨损和氧化磨损,伴有轻微的磨粒磨损。Mo2C has been used in conventional Ti（C,N）-based cermets to improve its wettability between hard phase and binder phase.Recently,some researchers have attempted to develop Ti（C,N）-based cermets free of Mo.To investigate the effect of replacing Mo2C by WC in conventional Ti（C,N）-based cermets,the cutting performance of cermets with the addition of WC and Mo2C was studied,respectively.Wear morphology of cutting tool was observed by SEM,and element distribution of tool surface was analyzed by EDS.The results showed that the cutting tool life of cermets with WC addition was equal to that with Mo2C addition.When the size of the initial WC powder decreased,the cutting tool life could be prolonged,the zonal tangle chip changed to helix chip,and the chip build-up could be reduced.Diffusion wear,oxidation wear accompanied by abrasive wear were considered to be the main wear mechanisms of the cermets.

关 键 词：TI(C N)基金属陶瓷 WC Mo2C 切削刀具 

分 类 号：TG71[金属学及工艺—刀具与模具]