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US 5,469,912 AGranted
Process for producing aluminum alloy sheet product
AssigneeGolden Aluminum Company
InventorDonald C. McAuliffe
Life of this patent
Estimating the term…
Abstract
An aluminum alloy is formed by continuously casting an aluminum alloy having a magnesium concentration of at least about 4.7 percent. Controlled forming and annealing steps in conjunction with the alloy form an aluminum sheet product that is useful for forming beverage container ends and tabs.
Claims16
A process for producing an aluminum alloy sheet, comprising the steps of:
- (a) forming an aluminum alloy melt comprising from about 4.7 percent to about 5.4 percent magnesium and from about 0.2 percent to about 0.5 percent manganese;
- (b) casting said aluminum alloy melt in a block casting apparatus to form a cast strip;
- (c) hot rolling said cast strip to reduce the thickness of said cast strip by at least about 65 percent and form a hot rolled strip;
- (d) annealing said hot rolled strip at a temperature of from about 720.degree. F. to about 730.degree. F. to form an annealed strip;
- (e) cold rolling said annealed strip to further reduce said thickness and form a cold rolled strip;
- (f) annealing said cold rolled strip at a temperature of from about 700.degree. F. to about 800.degree. F. to form a second annealed strip;
- and
- (g) cold rolling said second annealed strip to further reduce said thickness.
5 more elements
A process for producing aluminum alloy sheet, comprising the steps of:
- (a) forming an aluminum alloy melt comprising from about 5.0% to about 5.2% magnesium and from about 0.2% to about 0.5% manganese;
- (b) casting said aluminum alloy melt in a block casting apparatus to form a cast strip;
- (c) hot rolling said cast strip to reduce the thickness of said cast strip by at least about 65% and form a hot rolled strip;
- (d) annealing said hot form strip to rolled an annealed strip;
- (e) cold rolling said annealed strip to further reduce said thickness and form a cold rolled strip;
- (f) annealing said cold rolled strip at a temperature of from about 700.degree. F. to about 800.degree. F. to form a second annealed strip;
- and
- (g) cold rolling said second annealed strip to further reduce said thickness.
5 more elements
Dependencies are inferred from the claim text.