Refining recrystallized grain size in aluminum alloys
AssigneeSwiss Aluminium Ltd.
InventorsPhilip R. Sperry, William C. Setzer
Life of this patent
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Abstract
A wrought article possessing a fine recrystallized grain size which is prepared from an aluminum base alloy comprising, in weight percent, up to .6% silicon, up to .7% iron, up 1.5% manganese and 0.03 - 0.20% vanadium. The alloy may be cast by the DC casting method and does not require a homogenizing treatment. The alloy may be hot and cold worked, and retains its fine grain through annealing without requiring a high rate of heating to annealing temperature.
Claims18
An aluminum base alloy possessing a fine recrystallized grain size in the annealed condition which consists of 0.03 - 0.6% silicon, 0.03 - 0.7% iron, 0.03 - 1.5% manganese, 0.03 - 0.20% vanadium, up to 0.3% copper, up to 0.2% titanium, balance aluminum.
A wrought article possessing a fine recrystallized grain size prepared from an aluminum base alloy consisting of 0.03 - 0.6% silicon, 0.03 - 0.7% iron, 0.03 - 1.5% manganese, 0.03 - 0.20% vanadium, up to 0.3% copper, up to 0.2% titanium, balance aluminum.
A method for the preparation of wrought products possessing a fine recrystallized grain size which consists essentially of:
- A. providing an aluminum base alloy consisting of 0.03 - 0.6% silicon, 0.03 - 0.7% iron, 0.03 - 1.5% manganese, 0.03 - 0.20% vanadium, up to 0.3% copper, up to 0.2% titanium, balance aluminum;
- B. casting said alloy;
- C. heating said alloy to a homogenizing temperature;
- D. hot and cold working said alloy;
- E. wherein said cold working is followed by at least one annealing treatment which does not require a high rate of heating to annealing temperature.
Dependencies are inferred from the claim text.