Back to results
US 2002/0153123 A1Published application
Continuous casting of aluminum
AssigneeAlcoa Inc.
InventorAli Unal
Life of this patent
Estimating the term…
Abstract
A method of continuous casting aluminum alloys between a pair of rolls. Molten aluminum alloy is delivered to a roll bite between the rolls and passes into the roll nip in a semi-molten state. A solid strip of cast aluminum alloy exits the nip at speeds of about 25 to about 400 feet per minute. Thin gauge (0.07-0.25 inch) strip may be produced at rates of up to 2000 pounds per hour per inch of cast strip width.
Claims45
A method of continuously casting aluminum alloy strip comprising the steps of:
- providing a pair of rolls defining a nip therebetween;
- delivering molten aluminum alloy to the rolls;
- rotating the rolls to advance the molten aluminum alloy towards the nip;
- solidifying the molten aluminum alloy to produce a solid outer layer of aluminum alloy adjacent each roll and a semi-solid central layer of aluminum alloy between the solid layers;
- advancing the solid outer layers and the semi-solid central layer into the nip;
- solidifying the central layer within the nip to produce a solid strip of aluminum alloy comprising the central layer and the outer layers;
- and
- withdrawing a strip of solid aluminum alloy from the nip.
5 more elements
A strip of aluminum alloy comprising:
- a pair of outer layers of an aluminum alloy;
- and
- a central layer of said aluminum alloy positioned between said outer layers, said outer layers and said central layer having been produced into a strip by continuous casting of a molten aluminum alloy composition between a pair of rolls, the molten aluminum alloy comprising eutectic forming alloying elements in an initial concentration,
- wherein the concentration of said eutectic forming alloying elements in said central layer is less than the concentration of said eutectic forming alloying elements in each said outer layer.
1 more element
A strip of aluminum alloy comprising:
- a pair of outer layers of an aluminum alloy;
- and
- a central layer of said aluminum alloy positioned between said outer layers and comprising globular dendrites, said outer layers and said central layer having been produced into a strip by continuous casting of a melt of said aluminum alloy composition delivered to a pair of rotating rolls.
Dependencies are inferred from the claim text.