Alloys for highly shaped aluminum products and methods of making the same
Described herein are novel aluminum containing alloys. The alloys are highly formable and can be used for producing highly shaped aluminum products, including bottles and cans.
1. A method of producing a metal sheet, comprising:
direct chill casting an aluminum alloy to form an ingot, wherein the aluminum alloy comprises 0.25-0.35 wt. % Si, 0.40-0.60 wt. % Fe, 0-0.40 wt. % Cu, 1.10-1.50 wt. % Mn, 0-0.76 wt. % Mg, 0.001-0.05 wt. % Cr, 0-0.3 wt. % Zn, up to 0.15 wt. % of impurities, and Al;
homogenizing the ingot in a two-stage homogenizing cycle to form an ingot containing a plurality of Mn-containing dispersoids, the two-stage homogenizing cycle comprising:
heating the ingot to a peak metal temperature of at least 625° C.;
allowing the ingot to stand at the peak metal temperature for four or more hours;
cooling the ingot to a temperature of 550° C. or lower; and
allowing the ingot to stand for up to 20 hours;
hot rolling the ingot containing the plurality of Mn-containing dispersoids to produce a metal sheet; and
cold rolling the metal sheet.
2. The method of claim 1 , wherein the plurality of Mn-containing dispersoids comprises Mn-containing dispersoids each having a diameter of 1 μm or less.
3. The method of claim 1 , wherein the aluminum alloy comprises 0.25-0.35 wt. % Si, 0.40-0.50 wt. % Fe, 0.08-0.22 wt. % Cu, 1.10-1.30 wt. % Mn, 0-0.5 wt. % Mg, 0.001-0.03 wt. % Cr, 0.07-0.13 wt. % Zn, up to 0.15 wt. % of impurities, and Al.
4. The method of claim 1 , wherein the aluminum alloy comprises 0.25-0.30 wt. % Si, 0.40-0.45 wt. % Fe, 0.10-0.20 wt. % Cu, 1.15-1.25 wt. % Mn, 0-0.25 wt. % Mg, 0.003-0.02 wt. % Cr, 0.07-0.10 wt. % Zn, up to 0.15 wt. % of impurities, and Al.
5. The method of claim 1 , wherein the aluminum alloy comprises Mg in an amount of 0.10 wt. % or less.
6. The method of claim 1 , wherein the aluminum alloy comprises Cr in an amount of 0.001-0.03 wt. %.
7. The method of claim 1 , further comprising batch annealing the metal sheet after hot rolling at an annealing temperature from 350° C. to 450° C. for a period of time.
8. The method of claim 7 , wherein the period of time is up to 1 hour.
9. The method of claim 1 , wherein an exit temperature from hot rolling is at least 300° C.
10. The method of claim 9 , further comprising coiling the metal sheet at the exit temperature to self-anneal the metal sheet.