Explanation

The phenomenon that the metal after cold working forms new grains and grows up to replace the deformation structure during annealing. The driving force of recrystallization is deformation storage energy, and the main structural forms are high density dislocations and point defects. After the formed new grains completely replace the deformed grains, continue heating and holding, and the grain boundary can still continue to move. As a result, the average size of grains becomes larger, and the number of grains in unit volume decreases.

Classification