Huawei specializes in the manufacture and export of aluminum coil sheet metal for more than 20 years with advanced production technology. The technical methods of aluminum sheet rolling include hot rolling and cold rolling. When it comes to 4x8 Aluminum Sheet, the first thing we think of is the cold rolling process. The rolling process below the recrystallization temperature of metals and alloys is called cold rolling. In the cold rolling process, although the temperature of the rolled piece can be high due to metal deformation heat and frictional heat, there is a certain recovery effect, but cold rolling hardening (work hardening) plays a major role in the cold rolling process.
Compared with hot rolling, the main feature of cold rolling is that thinner aluminum sheets and strips can be obtained. Usually the thickness of the hot rolled plate is 6-8 mm. The minimum thickness is 2.5mm-3.0mm. Due to the large temperature drop of the rolled aluminum sheet during the hot rolling process, it is difficult for hot rolling to continue rolling to a thinner thickness, and cold rolling is likely to cause the rolled piece to continue to become thinner. Usually cold rolling mills can roll to 0.5-4.5mm, and more advanced cold rolling mills can roll out ultra-thin or thick foils with a thickness of 0.1mm-0.2mm. Compared with hot rolling, the main feature of cold rolling is that it can Produce products with precise dimensions, uniform thickness, good flatness and surface gloss, good product organization, and high surface quality.
Since the cold rolling mill has higher precision than the hot rolling mill, the comprehensive automation control level of the cold rolling mill is higher. For example, more advanced cold rolling mills are equipped with automatic controls for thickness and shape. Also, cold rolling can roll aluminum roll metal sheet with high surface quality by using rolls with higher finish.