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US 2003/0205357 A1Published application
Casting of non-ferrous metals
AssigneeAlcoa Inc.
InventorAli Unal
Life of this patent
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Abstract
A method of continuous casting non-ferrous alloys which includes delivering molten non-ferrous alloy to a casting apparatus. The casting apparatus rapidly cools at least a portion of the non-ferrous alloy at a rate of at least about 100° C. thereby solidifying an outer layer of the non-ferrous alloy surrounding an inner layer of a molten component and a solid component of dendrites. The dendrites are altered to yield cast product exhibiting good resistance to cracking.
Claims31
A method of continuously casting molten metal into a metal product comprising the steps of:
- providing non-ferrous molten metal to a pair of spaced apart advancing casting surfaces;
- solidifying the molten metal on the casting surfaces while advancing the metal between the casting surfaces to produce solid metal outer layers adjacent the casting surfaces and a semi-solid inner layer containing dendrites of the metal between the solid metal outer layers;
- breaking the dendrites in the inner layer;
- solidifying the semi-solid inner layer to produce a solid metal product comprised of the inner layer and the outer layers;
- and
- withdrawing the solid metal product from between the casting surfaces.
3 more elements
A strip of non-ferrous alloy comprising:
- a pair of outer layers of a non-ferrous alloy;
- and
- a central layer of said non-ferrous 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 non-ferrous alloy composition.
Dependencies are inferred from the claim text.