the hardness and wear resistance of the tooth blade

Hardness is the basic characteristic of tooth blade material. Toothed blades must cut chips from the workpiece with a hardness greater than that of the workpiece material. The chip blade hardness of toothed blade used for chip metal is generally above 60HRC. Abrasion resistance is the ability of a material to resist wear. Generally speaking, the higher the hardness of the tooth blade material. The better the wear resistance. The hardness of the hard spot in the organization is taller, the amount is more, grain is smaller, distribution is more even, criterion wear resistance had jumped over. Wear resistance is also related to the chemical composition, strength, microstructure and temperature of the friction zone. The higher the hardness, the better wear resistance.

The material of a mechanical blade must have sufficient strength and toughness to allow the toothed blade to withstand great pressure and to operate under the shock and vibration conditions that often occur in the cutting process without breaking the edge or breaking.

Heat resistance is the main criterion to measure the cutting performance of toothed blade materials. It refers to the performance of toothed blade material to maintain the agreed hardness, wear resistance, strength and toughness under high temperature conditions. The toothed blade material should also have the ability of oxidation resistance and good adhesion resistance and diffusion resistance at high temperature, that is, the protective material should have good chemical stability.

The better the thermal conductivity of toothed blade material is, the more easily the cutting heat will disperse from the cutting zone, which is beneficial to reduce the cutting temperature.