ALMG-strip capable of high strength and easy molding and its manufacturing method

摘要

The present invention relates to a method for producing aluminum strips or sheets from aluminum alloys, aluminum strips and uses thereof. The purpose of providing a method for producing an aluminum alloy strip from a non-precipitation hardening aluminum alloy from which molded parts, in particular body structure components, for a vehicle component can be manufactured and weight reduction can be achieved, RTI ID = 0.0 aluminum alloy / RTI 3.6% Mg 6% Si? 0.4%, Fe? 0.5%, Cu? 0.15% 0.1%? Mn? 0.4%, Cr 0.05% Zn? 0.20% Ti? 0.20% The residual Al and unavoidable impurities are individually at most 0.05% by weight and at most 0.15% by weight in total, The method includes the steps described below: Casting a rolling ingot made of the specified aluminum alloy, - homogenizing the rolling ingot for at least 0.5 hours at 480 ° C to 550 ° C, - hot rolling the rolled ingot to a hot strip at a temperature of 280 캜 to 500 캜; - cold rolling the aluminum alloy strip after hot rolling to a rolling rate between 10% and 45% before final intermediate annealing, Performing at least final intermediate annealing at 300 ° C to 500 ° C for the cold-rolled aluminum alloy strip in such a manner that the cold-rolled aluminum alloy strip has recrystallized microstructure after intermediate annealing, Cold-rolling the intermediate annealed aluminum alloy strip to a final thickness at a rolling rate of 30% to 60%; and - reverse-annealing the aluminum alloy strip in a coil wound to a final thickness at a metal temperature of 190 ° C to 250 ° C for at least 0.5 hour.