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The proper grade of steel is the basic requirement of an efficient blade.

Time:2014-03-25 Read: Helen
The proper grade of steel is the basic requirement of an efficient blade.

  In the working condition of strong friction, high pressure and high temper, the blades need to:

  1.Desired working hardness and wear resistance

  The hardness of the cutting blades must higher than the being cut material. Most of the cutting blades’ hardness is higher than 60 HRC. As for the material, the harder of the material the better of the wear resistance. However, the wear resistance also depends on its chemical composition and its metallographic structure.

  2. Tensile strength

  Ultimate tensile strength (UTS), often shortened to tensile strength (TS) or ultimate strength, is the maximum stress that a material can withstand while being stretched or pulled before failing or breaking. Tensile strength is not the same as compressive strength and the values can be quite different.

  Tensile strength means the ability of not being broken in working condition. Generally speaking, the higher of the hardness, the material would be much easier to get broken. Hardness and Tensile strength is contradictory.

  3. Heat resistance

  It is also a requirement for slitting blades. It reflects the ability of keeping hardness, wear resistance, tensile strength in high tempered working condition.