The concept of hot rolling: hot rolling is relative to cold rolling, cold rolling is rolling performed below the recrystallization temperature, and hot rolling is rolling performed at a temperature above the recrystallization temperature.
Advantages of hot rolling:
a. Hot rolling can significantly reduce energy consumption and reduce costs. During hot rolling, the metal plasticity is high, deformation resistance is low, and the energy consumption of metal deformation is greatly reduced.
b. Hot rolling can improve the processing performance of metals and alloys, that is, the coarse grains in the as-cast state are fractured, significant cracks are healed, casting defects are reduced or eliminated, the as-cast microstructure is transformed into deformed structure, and the processability of the alloy is improved.
c. Hot rolling usually adopts large ingots, and rolling at large reductions not only improves the production efficiency, but also creates the conditions for increasing the rolling speed and achieving the continuous and automated rolling process.
