FABRICATION OF ALUMINUM ALLOY SHEET FROM SCRAP ALUMINUM FOR CONTAINER COMPONENTS

摘要

AS-165-M-IIITITLE: FABRICATION OF ALUMINUM ALLOY SHEET FROMSCRAP ALUMINUM FOR CONTAINER COMPONENTSAbstract of the DisclosureA composition and method whereby aluminum scrap,including consumer scrap, is recycled and fabricated intoaluminum sheet and aluminum containers. Aluminum scrap ismelted in a heated furnace to form a melt composition. Themelt is adjusted to form the present composition, consistingessentially of silicon, 0.1 - 1.0%; iron 0.1 - 0.9%; manganese0.4 - 1.0%: magnesium 1.3 - 2.5%; copper .05 - 0.4%; andtitanium, 0 - 0.2%, the balance being essentially aluminum.Aluminum scrap comprising consumer scrap, plant scrap, andcan making scrap is heated to form the melt composition,which requires a minimum amount of adjustment to arrive atthe present alloy composition. The composition is then castand fabricated into sheet having strength and formabilityproperties making it suitable for container manufacture.Container manufacture according to the process and compo-sition of the present invention comprises drawn-and-ironedcan body manufacture and easy-opening end manufacture.Sheet fabrication according to the present invention comprisesdirect chill casting, scalping, preheating, hot breakdownrolling, continuous hot rolling, annealing, cold rolling andshearing.