石墨烯含量对WC-6Co硬质合金组织与性能的影响研究  

Study on Effect of Graphene Content on Microstructure and Properties of WC-6Co Cemented Carbide

作　　者：周小蓉[1] 黄立东[1] 杨旭静[2] 张华[1] 

机构地区：[1]湖南机电职业技术学院,湖南长沙410151 [2]湖南大学汽车车身先进设计制造国家重点实验室,湖南长沙410012

出　　处：《稀有金属与硬质合金》2017年第3期76-80,共5页Rare Metals and Cemented Carbides

基　　金：湖南省科技厅科技计划项目(2011FJ3005)

摘　　要：采用分步真空球磨+热压烧结法,在WC-6Co硬质合金中添加不同含量的石墨烯,制备了新型硬质合金刀具材料,并对其进行物相组成、显微组织、力学性能和耐磨损性能的分析。结果表明,随石墨烯含量增加,新型硬质合金刀具材料的表面硬度、力学性能和耐磨损性能均先提高后下降。新型硬质合金刀具材料的石墨烯含量优选为2%,表面HV硬度达2 842;与商业WC-6Co硬质合金刀具材料相比,新型硬质合金刀具材料的横向断裂强度提高143%,磨损体积减小71%。The new-type cemented carbide tool material was prepared by adding graphene into WC-6Co cemented carbide with the methods of stepwise vacuum ball milling and hot pressing sintering. Its phase composition,microstructure, mechanical properties and wear resistance were analyzed. The results show that surface hardness, mechanical properties and wear resistance of the new-type tool material increase at first and then decrease with the increase of graphene content. The optimized graphene content is 2 % ,and surface HV hardness reaches 2 842. Compared with commercial WC-6Co tool material,the new-type tool material has increased transverse rupture strength by 143% and decreased wear volume by 71%.

关 键 词：新型硬质合金刀具材料 WC-6Co-石墨烯 石墨烯 分步真空球磨 热压烧结 

分 类 号：TG711[金属学及工艺—刀具与模具]