Hot rolling is relative to cold rolling, cold rolling is carried out under the recrystallization temperature of the rolling, and hot rolling is above the recrystallization temperature of the rolling.
Hot rolling aluminium plate generally refers to the metal recrystallization temperature above the rolling, hot rolling process of metal at the same time there is hardening and softening process, due to the impact of deformation speed, as long as the recovery and recrystallization process is too late, there will be some work hardening. Hot rolling can improve the processing performance of metals and alloys, reduce or eliminate casting defects.