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25
2019
-
02
What are the types of heat treatment? What does each use?
Author：
Gear heat treatment refers to a metal thermal processing process in which materials are heated, kept and cooled under solid state to obtain the expected microstructure and properties.
Heat treatment category:
1. Overall heat treatment of gears:
Overall heat treatment is a metal heat treatment process in which the workpiece is heated as a whole, and then cooled at an appropriate speed to obtain the required metallographic structure to change its overall mechanical properties.
2. Gear surface heat treatment:
A metal heat treatment process that changes the mechanical properties of the surface by heating and cooling the surface of a steel part. Surface quenching is the main content of surface heat treatment, the purpose of which is to obtain a surface layer with high hardness and favorable internal stress distribution to improve the wear resistance and fatigue resistance of the workpiece.
3. Chemical heat treatment of gears:
Chemical heat treatment is a metal heat treatment process that uses chemical reactions and sometimes physical methods to change the chemical composition and microstructure of the surface of steel in order to obtain better technical and economic benefits than homogeneous materials.
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