少层石墨烯对硬质合金耐磨性能的影响  

Effect of Few-Layer Graphene on Wear Resistance of Cemented Carbide

作　　者：罗平西 梁益龙[1] 彭翔 何冠宇 Luo Pingxi;Liang Yilong;Peng Xiang;He Guanyu(Guizhou University,Guiyang Guizhou 550025,China;Guizhou Aviation Technical Development Co.,Ltd.,Guiyang Guizhou 550081,China)

机构地区：[1]贵州大学,贵州贵阳550025 [2]贵州航宇科技发展股份有限公司,贵州贵阳550081

出　　处：《硬质合金》2025年第1期41-47,63,共8页Cemented Carbides

摘　　要：为提升硬质合金在复杂应力条件下的服役寿命,将少层石墨烯(1~3层)加入WC-Co硬质合金中,以提升其耐磨性能。结合表征结果可知,相比于无石墨烯试样,添加0.05%(质量分数)少层石墨烯的试样致密度及硬度分别提升了3.6个百分点及101HV30,同时还使试样摩擦系数和磨痕深度分别降低约0.16和90%。分析认为少层石墨烯之所以能够增强试样耐磨性,是因为其能够在提高试样致密度和硬度的同时,又具备润滑和保护效果,此外还能在烧结过程中起到补碳作用。当添加少层石墨烯的质量分数超过0.05%后,虽然试样的摩擦系数继续降低,但致密度、硬度及耐磨性均呈现下降趋势,这主要是因为过多的石墨烯会导致团聚现象产生,团聚后的石墨烯性能降低,难以起到理想的强化效果。In order to improve the service life of cemented carbide under complex stress conditions,this paper added a few-layer graphene(FLG)(with 1-3 layers)to WC-Co cemented carbide to improve its wear resistance.According to the characterization results,compared with the graphene-free sample,the addition of 0.05%FLG(mass fraction)increases the density and hardness of the sample by 3.6 percentage points and 101HV30,respectively,and it reduces the friction coefficient and wear depth of the sample by about 0.16 and 90%,respectively.The analysis shows that the reason why FLG can enhance the wear resistance of the sample is that it not only can improve the density and hardness of the sample at the same time but also has lubrication and protection effects.In addition,it can supplement carbon in the sintering process.When the mass fraction of FLG exceeds 0.05%,although the friction coefficient of the sample continues to decrease,the density,hardness,and wear resistance all show a downward trend,mainly because too much graphene will lead to agglomeration,and the performance of the graphene after agglomeration will be reduced,making it difficult to achieve an ideal strengthening effect.

关 键 词：少层石墨烯 WC-CO硬质合金 摩擦性能 致密度 硬度 

分 类 号：TG135.5[一般工业技术—材料科学与工程]