The relation between hot rolled strip and cold rolled coil, hot rolled strip and cold rolled strip
The hot rolled coil is made of slab (mainly continuous billet), and is made of roughing mill and finishing mill after heating. The hot strip from the last mill at the end of the finishing mill is cooled by laminar flow to the set temperature. The coiler is rolled into a coil and the cooled strip is rolled.
Hot rolled strip: hot rolled strip, also known as hot rolled strip, commonly known as hot plate. Hot rolled strip with width less than or equal to 600mm, steel plate of thickness 0.35-200mm and steel strip of 1.2-25mm thickness. The strength of hot rolled steel plate surface quality is relatively low, almost (oxidation low smoothness), but good plasticity, general plate, cold-rolled plate, high strength, high hardness, high surface smoothness, generally can be used as a punching sheet, plate.Cold rolled strip: cold rolled strip and sheet, general thickness of 0.1 ~ 3mm, width of 100 ~ 2000mm, all with hot rolled strip or steel plate as raw material, at room temperature by cold rolling rolling
Cold rolled coil (annealed): hot rolled coil obtained by pickling, cold rolling, batch annealing, flattening, and finishingThat is, the biggest difference between hot rolled coil and cold rolled coil is that the heat treatment process is different. (annealing process)Compared to the specific heat roll, the cold-rolled roll has a bright surface and a high degree of finish, but it produces more internal stress and is often annealed after cold rolling.
