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Hardness And Wear Resistance Of Toothed Blade
- Aug 19, 2018 -

How to distinguish the hardness and wear resistance of the toothed blade

Toothed blade is a mechanical knife used for sharpening pencils.

Most of the mechanical parts are made of carbon and alloy structural steel, when turning such materials, the formation of banded chips.

High hardness and abrasion resistance

Hardness is the basic characteristic of toothed blade material. Toothed blade to cut from the workpiece on the chip, the hardness must be greater than the workpiece material hardness. The cutting edge hardness of the toothed blade used in chip metal is generally above 60HRC. Wear resistance is the ability of the material to resist abrasion. Generally speaking, the hardness of the toothed blade material is higher. The better the wear resistance. The higher the hardness of the hard particle in the tissue, the more the quantity, the smaller the particle, the more uniform the distribution, the better the wear resistance.
Wear resistance is also related to the material's chemical composition, strength, microstructure and temperature of the friction zone.

Enough strength and toughness.

For toothed blades to withstand heavy pressure, as well as in the cutting process often occurred under the shock and vibration conditions, without the collapse of the blade and break, the mechanical blade material must have sufficient strength and toughness.

High heat resistance Heat resistance is the main mark to measure the cutting performance of toothed blade material. It refers to the toothed blade material in the high-temperature conditions to maintain I agreed to the hardness, wear resistance, strength and toughness of the performance.

Toothed blade materials should also have the ability to resist oxidation at high temperature and the ability to resist diffusion with good adhesion, that is, the material should have good chemical stability.

Good thermal physical properties and heat shock performance The better the thermal conductivity of the toothed blade material, the easier it is to disperse the cutting heat from the cutting area, which is helpful to reduce the cutting temperature.