Abstract：Cemented carbide with high hardness and high toughness properties has become a hot research area in recent years. Seven specimens of three graded cemented carbide were investigated in detail for the element content distribution and hardness by using X-ray energy dispersive spectroscopy and rockwell apparatus. Results show that all the specimens are WC-Co based cemented carbide. The addition of Co and Ni enhances the toughness， while reduces the hardness of cemented carbide. The additives TaC， TiC enhance hardness of WC-Co based cemented carbide. The enhancing effect of TaC and TiC on the hardness of cemented carbide greatly surpasses the weakening effect caused by the addition of Co and Ni.
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2017, Vol. 27 
