The requirements for the hardness of tool materials are usually relatively high, and the minimum requirement is higher than the hardness of the material of the workpiece being processed. The same is true for slitting machine blades. However, it is not just hardness. The tool must have a lot of performance to "kill" a way out in the market and win the favor of consumers. The high performance requirements for tools include wear resistance, heat resistance, thermal conductivity, strength, etc. The following is a detailed explanation.
High wear resistance and heat resistance. The wear resistance of tool materials refers to the ability to resist wear. Generally speaking, the higher the hardness of the tool material, the better the wear resistance; heat resistance is usually measured by the material's ability to maintain a higher hardness at high temperatures, that is, hot hardness. The better the heat resistance, the stronger the tool material's ability to resist deformation and wear during cutting.
Good thermal conductivity. The thermal conductivity of tool materials is expressed by thermal conductivity. The higher the thermal conductivity, the better the thermal conductivity. The heat generated during cutting is easy to conduct away, thereby reducing the temperature of the cutting part of the tool, reducing the wear of the tool, and improving the tool material's ability to resist thermal shock and thermal cracking.
Sufficient strength and toughness. The material of the cutting part of the tool must withstand great cutting force and impact during cutting, so the tool material must have sufficient strength and toughness.
Good processability. The tool material must have good machinability, including forging, welding, cutting, heat treatment, grindability, etc., to facilitate the manufacture of circular blades. Economical. The price is cheap, easy to promote and use, and obtain good benefits.