Patent ID: 6543122
Filing Date: 2003-04-08
Classification: B21B,Y10T

Abstract:
A process for producing thick aluminum sheet consisting of:(1) casting an aluminum alloy ingot; (2) cooling the ingot; (3) heating the ingot to from 500Â° C. to 600Â° C.; (4) hot rolling the ingot to a coilable sheet having a thickness of from 3.2 mm to 5.8 mm; (5) wrapping the hot sheet into a coil; (6) cooling the coiled sheet to less than 60Â° C.; (7) cold rolling the cooled sheet from the coil between two opposing rolls to reduce the thickness to 0.9 mm to 1.5 mm and to provide the sheet with a temperature of from 120Â° C. to 160Â° C., where heat is generated during the cold rolling stabilizing the sheet; (8) wrapping the reduced sheet into a coil; and (9) cooling the coiled sheet.