The production process of aluminum sheet
A process for the production with high yield strength and ductility of the aluminum alloy sheet suitable, especially for the manufacture of automobile panel. This process includes not been heat treated aluminum cast into a slab, said slab is then rolled through a series of final gauge sheet obtained, the better option is to back subsequent heat treatment recrystallization occurs. Rolling step including hot rolling and warm rolling the slab in order to obtain an intermediate thickness of the intermediate product, the intermediate product was then cooled, then in the range of from room temperature to 340 degrees Celsius in an intermediate warm rolling and cold rolling to obtain a final product specifications sheet. This series of rolling process is carried out continuously without an intermediate product and a complete circle around the intermediate sheet annealing. The invention also relates to a sheet alloy products. The present invention relates to a method for producing aluminum sheet production process. In particular, the present invention relates to a plate by rolling method never produced in the heat-treated alloy at suitable forming. For example, in the manufacture of automotive panel of 5000 series aluminum alloys. When the 5000 series aluminum alloys (ie magnesium as the major alloying element) is typically used in automotive panel (fender, door, hood, etc.), for such applications, providing a high yield point and high ductility of the alloy sheet are thinking To achieve. Rolling to get the right size and yield strength of aluminum sheet by continuous casting after. In the conventional continuous casting process, obtained from the casting metal after hot and warm system, then coiled (at a temperature of about 300 degrees Celsius) is then sent to another mill, in no more than 160 degrees Celsius for the final cold rolling .
To refine, to be mentioned herein that is commonly referred to as "hot rolling" is at a temperature higher than the recrystallization temperature of the alloy of implementation. In order alloy between a roll type seam or after rolling recrystallization annealed coils themselves. It said "cold rolling" usually means having a large number of work-hardening rate of the work roll during rolling the alloy to neither or after recrystallization does not occur reply. "In warm rolling" between the two execution so that no recrystallization yield strength due to the recovery process, but the substantial reduction. For aluminum, hot temperatures over 350 degrees Celsius, cold temperature of less than 150 degrees Celsius, the temperature in the rolling between 150 and 350 degrees Celsius implemented. Unfortunately, the conventional method of the above-mentioned intermediate winding is cumbersome and expensive, storage and transportation need to obtain a product having a microcrystalline structure suitable to produce the desired yield strength. In U.S. Patent No. 5,514,228, and in the May 7, 1996 discloses a coaxial casting process, which did not go through the middle of the plate and rolled into the final lap around the required specifications. However, before the final rolling it needs further solution treatment, so before the final winding sheet completely is annealed continuously. However, the 5000 series alloys after solution treatment can not be strengthened. Source:http://www.jnsteelpipe.com/
