Method for making aluminum foil and cast strip stock for aluminu

Details Method for making aluminum foil and cast strip stock for aluminu Method for making aluminum foil and cast strip stock for aluminu

1994-07-15

1995-11-14

Simmons, David A.

Metal treatment

Process of modifying or maintaining internal physical...

With casting or solidifying from melt

148538, 148552, 148695, 148696, 148438, 420528, 420537, 420538, C22F 104, C22C 2100

Patent

active

054663121

ABSTRACT:
A method for making aluminum foil comprises providing an aluminum-based alloy composition consisting essentially of about 0.05 to 0.20 weight percent silicon, about 0.02 to 0.50 weight percent iron, about 0.05 to 0.30 weight percent copper and balance aluminum and inevitable impurities and grain refining elements, wherein the ratio of iron to silicon ranges between about 2:1 and 4:1. The aluminum-alloy composition is continuously cast using a unitary and chilled casting wheel to form a cast strip product of desired width and gauge. The cast strip product is then homogenized, cold rolled and recrystallized annealed into an aluminum foil product. The aluminum-based alloy composition produces a single roll cast product having minimum microshrinkage porosity on the air surface thereof. Reducing or eliminating the microshrinkage porosity in the cast product results in an aluminum foil product having a minimum of pinholes in the final foil product.

REFERENCES:
patent: 3397044 (1968-08-01), Bylund
patent: 3697260 (1972-10-01), Hunsicker et al.
patent: 4800133 (1989-01-01), Arai et al.
patent: 5186235 (1993-02-01), Ward, Jr.
"Registration Record of Aluminum Association Designations and Chemical Composition Limits for Wrought Aluminum and Wrought Aluminum Alloys", The Aluminum Association, Inc., Washington, D.C., pp. 1-15, Jan. 1989.

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