1. Remove the internal stress of the blank. It is mainly used for castings, forgings and weldments.
2. Improve processing conditions. Etc. Make the material easy to process. Such as annealing and normalizing. Quenching and tempering treatment.
3. Improve the general mechanical properties of metal materials. Processing of non-standard parts.
4. It can improve the hardness of materials. Such as carburizing, quenching, etc.
