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Hot Rolling of sheets

Rolling process in which a heated workpiece is pressed between rotating rollers to reduce its thickness. The heat causes recrystallization of the grains.

Illustration of Hot Rolling of sheets

The process

The work piece [1], usually a sheet blank is preheated to its recrystallization temperature and fed between two rotating rollers [2]. The rollers compress the plate so that its thickness decreases.

As the material undergoing this process is recrystallized [3] new grains are created after rolling, which provides more isotropic properties than cold-rolling.

Advantages and disadvantages
In comparison with alternative methods
Equiaxial microstructure of grains
larger reduction of workpiece possible
Requires less power
Lower tolerance control
Worse mechanical properties
Rough surface finish due to oxidation