First of all, we need to understand how many methods are included in the so-called heat treatment during parts machining? In view of the frequency and importance of various methods in the mechanical processing process, we choose the following ones for analysis, that is, focused analysis. n the mechanical processing process, we use the four most common heat treatment methods: annealing, normalizing, quenching and tempering. Let’s analyze them one by one below.

Annealing

The definition of annealing treatment: a metal heat treatment process that heats metal parts to a certain high temperature, maintains it for a period of time, and then allows it to cool naturally.

Main effect：

• Reduce the hardness of parts and improve cutting performance

• Eliminate residual stress in parts, stabilize dimensions, and reduce the probability of deformation and cracks.
• Refine grains, adjust structure, and eliminate material structure defects

• Uniform material structure and composition, improve material properties or prepare the structure for subsequent heat treatment processes

Normalizing

Definition：The metal parts are heated to a certain high temperature, maintained for a period of time, and then cooled in the air by water spray, spray, blowing, etc. The difference from the annealing treatment is that the cooling rate is faster, so the obtained material The structure is finer and the mechanical properties are improved.

Main effect：

• Remove the internal stress of the material .

• Reduce material hardness and improve plasticity.

The above is an application sharing of the heat treatment process involved in the machining process of a part.