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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%。
A new type of cemented carbide tool material was prepared by adding different content of graphene to WC-6Co cemented carbide by the step-by-step vacuum ball milling + hot pressing sintering method. The phase composition, microstructure, mechanical properties and Wear resistance analysis. The results show that with the increase of graphene content, the surface hardness, mechanical properties and wear resistance of the new cemented carbide tool materials increase and then decrease. The new carbide tool material has a graphene content of preferably 2% and a surface HV hardness of 2,842. As compared with the commercial WC-6Co cemented carbide tool material, the transverse rupture strength of the new cemented carbide tool material is increased by 143% 71% reduction in volume.