Difference Between Hot Rolling And Cold Rolling

1. The two are essentially different

(1) The essence of cold rolled steel: cold rolled steel is the steel produced by cold rolling. Cold rolling is to further thin the steel plate to the target thickness at room temperature.

(2) The essence of hot rolled steel: hot rolled steel is a kind of steel rolled above recrystallization temperature.

2. Their characteristics are different

(1) Features of cold rolled steel: the thickness of cold rolled steel plate is more accurate, and the surface is smooth and beautiful. At the same time, it also has various superior mechanical properties, especially processing properties.

(2) Features of hot rolled steel: high plasticity of metal during hot rolling, low deformation resistance, greatly reducing the energy consumption of metal deformation. Hot rolling can improve the processing properties of metals and alloys, that is, the coarse grains in the casting state will be broken, the cracks will heal significantly, the casting defects will be reduced or eliminated, the as cast structure will be transformed into deformed structure, and the processing properties of alloys will be improved.