Today is 2021-10-19 Tuesday,Welcome to this site 

Today is 2021-10-19 Tuesday,Welcome to this site 

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Junqiang machinery teaches you how to identify the hardness and wear resistance of toothed blade

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Tooth blade is used for cutting pencils. Most mechanical parts are made of carbon and alloy structural steel. When turning such materials, strip chips are formed.
  High hardness and wear resistance
  Hardness is the basic characteristic of tooth blade material. The hardness of the tooth blade must be larger than that of the material of the workpiece. The hardness of the cutting edge of the tooth blade used in chip metal is generally above 60HRC. Wear resistance is the ability of materials to resist wear. Generally speaking, the hardness of the tooth blade material is higher. The better its wear resistance. The higher the hardness of the hard point in the structure, the more the number, the smaller the particles and the more uniform the distribution, the better the wear resistance. The wear resistance is also related to the chemical composition, strength, microstructure and temperature of friction zone. The wear resistance WR of the material can be expressed by formula; We = kico.5e-0.8h1.43, the higher the hardness, the better the wear resistance.
  Sufficient strength and toughness
  In order to make the tooth blade bear great pressure again, and work under the impact and vibration conditions which often occur during cutting without breaking and breaking, the mechanical blade material must have sufficient strength and toughness.
  High heat resistance
  Heat resistance is the main indicator to measure the cutting performance of tooth blade. It refers to the performance of tooth blade material which keeps the agreed hardness, wear resistance, strength and toughness at high temperature. The tooth blade material should also have the ability of oxidation resistance and good anti adhesion and diffusion resistance at high temperature, that is, the sanitary materials should have good chemical stability.
  Good thermal physical and thermal shock properties
  The better the heat conductivity of the tooth blade material, the easier the cutting heat is to be scattered from the cutting area, which is conducive to reducing the cutting temperature.


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