Annealing is a metal heat treatment process, which means slowly heating the metal to a certain temperature, holding it for a sufficient time, and then cooling it at an appropriate speed.
The purpose is as follows:
Reduce hardness and improve machinability;
Reduce residual stress, stabilize size;
Reduce deformation and crack tendency;
Refine the grain, adjust the structure and eliminate the structural defects.
To be precise, annealing is a heat treatment process for materials, including metallic materials and non-metallic materials.
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