CEMENTED CARBIDE MATERIAL AND TOOL.

摘要

Cemented carbide alloys are a material having hardness and high toughness. Various trace elements are added in order to obtain these performances. One of the additives is vanadium carbide (VC). However, the incorporation thereof failed to evenly improve properties of a product because a raw material obtained by pulverizing the carbide has a large particle diameter. The carbide, which is one of raw materials for constituting a material for tools, e.g., a hob, was replaced with vanadium trioxide (V2O3), which is an oxide. Since the vanadium oxide is softer than vanadium carbide, it is easily reduced to fine particles in the step of mixing by means of a ball mill in raw-material preparation. Due to the effect of the vanadium trioxide evenly dispersed in the raw materials, the cemented carbide alloy obtained through sintering has an enhanced hardness.