Aluminum cold rolling and hot-rolled aluminum: the aluminum rolling at room temperature is generally understood to be cold-rolled, from metallurgical point of view, lower than the crystallization temperature of rolling cold rolling. Hot rolling, the slab is (mainly billet) as raw material, heated by a roughing train and finishing train made of steel.
Cold-rolled aluminum: hot rolled coil as raw materials for cold rolling after pickling descaling, the finished product is rolling hard volumes, due to continuous cold work hardening caused by deformation of the strength of the rolling hard volumes, and increased hardness, tough plastic index decreases. Accordingly stamping performance will deteriorate and can only be used for simple modification parts. Rolling hard volumes can be used as raw material for hot-dip galvanizing plant, because hot dip galvanizing line is provided with annealing line. Rolling hard volumes generally weighs 6 to 13.5 tons of steel coils at room temperature, the volume of hot pickling continuous rolling.
Product Features:
Because there is no annealing, high hardness (HRB greater than 90), machining performance is poor, only a simple directional bending less than 90 degrees (perpendicular to the winding direction). Something simple terms, a slab after heating (on TV is kind of burning red hot steel block) fine a few road rolling, and then trimming, correction becomes steel, which is called hot rolling.
Aluminum cold rolling, are processed on the basis of hot rolled coils rolled out, in general, it is hot-rolled pickled --- --- such as cold rolling process. Cold rolling at room temperature, is machined from hot-rolled plates made, although the process also makes steel rolling because warming was nevertheless called cold rolling.