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What is the transformation of the structure of the packaging steel strip chilled plate during annealing?
by：Hongmei
2021-03-15
What is the transformation of the structure of the packaging steel strip chilled plate during annealing?
The cold-rolled chilled plate of the hot-rolled plate is a fibrous structure. In fact, this is an unstable structure, called a metastable structure. By heating to a certain temperature, the metastable organization can obtain a certain amount of energy, so that the deformed deformed structure can be transformed into a new equiaxed stable structure. This kind of heat treatment process in which the cold-rolled steel strip is heated to above the recrystallization temperature, kept for a proper time, and then cooled at a slower speed to eliminate the 'work hardening' phenomenon of the steel strip in the cold rolling process. It is called recrystallization annealing of steel strip. The crystal lattice structure of the steel strip does not change during the recrystallization annealing process, and no new phases will be formed, but the morphology, that is, the shape and size of the crystal grains, has changed. However, this process is not a simple organization recovery, it is not to restore the organization after cold rolling to the organization before cold rolling, but to make all the original fibrous organization disappear, and on this basis, recrystallize a new organization. Although the microstructures before cold rolling and after recrystallization and annealing are equiaxed grains, there is no necessary connection between the two.
The cold-rolled chilled plate of the hot-rolled plate is a fibrous structure. In fact, this is an unstable structure, called a metastable structure. By heating to a certain temperature, the metastable organization can obtain a certain amount of energy, so that the deformed deformed structure can be transformed into a new equiaxed stable structure. This kind of heat treatment process in which the cold-rolled steel strip is heated to above the recrystallization temperature, kept for a proper time, and then cooled at a slower speed to eliminate the 'work hardening' phenomenon of the steel strip in the cold rolling process. It is called recrystallization annealing of steel strip. The crystal lattice structure of the steel strip does not change during the recrystallization annealing process, and no new phases will be formed, but the morphology, that is, the shape and size of the crystal grains, has changed. However, this process is not a simple organization recovery, it is not to restore the organization after cold rolling to the organization before cold rolling, but to make all the original fibrous organization disappear, and on this basis, recrystallize a new organization. Although the microstructures before cold rolling and after recrystallization and annealing are equiaxed grains, there is no necessary connection between the two.
