Before cutting metal, the hardness of tool materials with high hardness and high wear resistance must be higher than that of the processed materials, which is an essential basic requirement for tool materials. The hardness of existing tool materials is above 60HRC. The harder the tool material, the better the wear resistance. However, due to the complex cutting conditions, the wear resistance of materials also depends on the stability of their chemical composition and metallographic structure.

Sufficient strength and impact toughness strength refer to the performance of resisting cutting force without breaking the blade and the cutter bar. Generally, it is expressed by bending strength. Impact toughness refers to the ability of tool materials to ensure no edge collapse under intermittent cutting or impact conditions. Generally speaking, the higher the hardness, the lower the impact toughness and the more brittle the material is. Hardness and toughness are a pair of contradictions, and they are also a key for cutting tool materials to overcome.

Three high heat resistance and heat resistance, also known as red hardness, are the main indexes to measure the properties of tool materials. It comprehensively reflects the ability of tool materials to maintain hardness, wear resistance, strength, oxidation resistance, adhesion resistance and diffusion resistance at high temperature.

Good manufacturability and economy In order to facilitate manufacturing, tool materials should have good manufacturability, such as forging, heat treatment and grinding performance. Of course, economy should be considered comprehensively when manufacturing and selecting. At present, superhard materials and coated tool materials are expensive, but they have a long service life. In mass production, the cost allocated to each part is reduced. Therefore, we must consider it comprehensively when choosing.