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US 7,611,778 B2Granted
Simultaneous multi-alloy casting
AssigneeAlcoa Inc.
InventorsRaymond J. Kilmer, James L. Kirby
Life of this patent
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Abstract
A method of casting a multi-layered metal ingot including the steps of delivering a metallic divider member into a direct chill mold, pouring a first molten metal into the mold on one side of the divider member, and pouring a second molten metal into the mold on the other side of the divider member, and allowing the first molten metal and the second molten metal solidify to form a metal ingot which includes the divider metal layer disposed there between.
Claims5
A brazing sheet comprising:
- a first aluminum metal layer;
- and
- a second aluminum metal layer connected to the first aluminum metal layer, wherein the second aluminum metal layer has a different composition than the first aluminum metal layer;
- wherein the brazing sheet is produced by a process comprising:
- (A) direct chill casting a multi-layered slab, the direct chill casting process comprising:
- (1) flowing a first molten aluminum alloy in a direct chill casting apparatus;
- (2) providing a barrier layer;
- (3) flowing a second molten aluminum alloy into a direct chill casting apparatus,
- (4) wherein the second molten aluminum alloy has a different composition than the first molten aluminum alloy,
- (5) wherein the barrier layer prevents the first molten aluminum alloy from intermixing with the second molten aluminum alloy;
- (6) forming the first aluminum layer from the first molten aluminum alloy;
- and
- (7) forming the second distinct aluminum layer from the second molten aluminum alloy;
- and
- (B) rolling the multi-layered slab to form the brazing sheet.
12 more elements
Dependencies are inferred from the claim text.