High-performance ultra-fine grained hard alloy new material splitting cutter

The invention discloses a high-performance ultra-fine grained hard alloy new material splitting cutter, belonging to the technical field of hard alloy cutters. The high-performance ultra-fine grained hard alloy new material splitting cutter is manufactured by adopting a powder metallurgy process, and consists of the following raw material components in percentage by mass: 0.40-0.50% of CT, 85.0-85.5% of WC, 12.0-12.5% of Co, 0.4-0.6% of Vc, 0.7-0.9% of Cr3C2, 0.6-0.8% of TaC and 0.03-0.07% of octadecanoic acid. By adopting an ingenious new formula of an ultra-fine grained material, the problems of pores, non-uniform distribution of a Co phase and the like caused by poor wet milling dispersion are effectively solved from the ingredients, thus a high-quality mixture is prepared, and the slitting and shearing cutter with high performance and high precision is produced; and the cutter has high hardness, high strength, strong abrasion resistance and good toughness, and the quality and comprehensive use performance of the cutter are in the domestic leading position.