Basic principles of steel heat treatment

What is the heat treatment of steel?

Steel is heated in a solid state by appropriate methods, heat preservation, and cooled to room temperature at a certain cooling rate to change the structure of the steel to change its performance. This is called the heat treatment of steel.

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Therefore, the purpose of heat treatment is to change the properties of the workpiece by changing the surface or internal structure of the material to obtain the required mechanical properties. For example, quenching:

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① Improve the mechanical properties of metal materials or parts. For example: improve the hardness and wear resistance of tools, bearings, etc., improve the elastic limit of springs, and improve the comprehensive mechanical properties of shaft parts.

② Improve the material properties or chemical properties of some special steels. Such as improving the corrosion resistance of stainless steel and increasing the permanent magnetism of magnetic steel.