采用热压烧结法制备了不同SiC晶须含量的硬质合金复合刀具,研究了不同SiC晶须含量对材料密度、硬度、孔隙度、断裂韧性和断口形貌的影响。结果表明,SiC晶须含量的增加会使得硬质合金复合刀具密度呈现逐渐降低的趋势;当SiC晶须含量为0.4%时,复合刀具可以取得硬度和断裂韧性的最大值;添加SiC晶须的复合刀具中的晶须拔出和晶须桥接机制可以有效提高复合刀具的强塑性。 Cemented carbide composite tools with different content of SiC whiskers were prepared by hot pressing sintering method. The effects of different SiC whiskers content on the density, hardness, porosity, fracture toughness and fracture morphology were studied. The results show that the increase of SiC whisker content will decrease the density of the cemented carbide tool. When the content of SiC whisker is 0.4%, the maximum value of hardness and fracture toughness can be obtained by the composite tool. The whisker extraction and whisker bridging mechanism in the composite tool can effectively enhance the plasticity of the composite tool.