Different Processing Requirements For Hot Rolling And Cold Rolling

1. Processing requirements for cold rolled steel: cold rolled steel requires high mill power and low rolling efficiency, and intermediate annealing is also required to eliminate work hardening during rolling, so the cost is high.

2. Processing requirements for hot rolled steel: hot rolled steel is easy to roll and has high rolling efficiency. The hot rolling temperature includes the opening rolling temperature and the final rolling temperature. The opening rolling temperature is mainly determined according to about 80% of the solidus temperature in the alloy phase diagram, while the final rolling temperature is determined according to the alloy plasticity diagram, which is generally required to be controlled above the alloy recrystallization temperature.