Method of manufacturing an Al—Mg—Si alloy rolled sheet product with excellent formability
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United States of America Patent
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Apr 10, 2018
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Feb 18, 2014
filing date -
Mar 7, 2013
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Abstract
A method of manufacturing aluminium alloy rolled sheet with excellent formability and suitable for an automotive body, the method including: casting an ingot of aluminium alloy of, in wt. %: Si 0.5 to 1.5, Mg 0.2 to 0.7, Fe 0.03 to 0.30, Cu up to 0.30, optionally one or more elements selected from the group of: (Mn, Zr, Cr, V), Zn up to 0.3, Ti up to 0.15, impurities and aluminium; homogenising the cast ingot at 450° C. or more; hot rolling the ingot to a hot-rolled product; cold rolling the hot-rolled product to a cold-rolled product of intermediate gauge; continuous intermediate annealing the cold-rolled product of intermediate gauge in the range of 360-580° C.; cold rolling the intermediate annealed cold-rolled product to a sheet of final gauge up to 2.5 mm; solution heat treating the sheet; and quenching the solution heat treated sheet.
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