Metal treatment – Stock – Aluminum base
Patent
1985-12-30
1989-03-14
Rutledge, L. Dewayne
Metal treatment
Stock
Aluminum base
148 115A, 420533, C22F 1047
Patent
active
048121835
ABSTRACT:
Disclosed is a method of making an improved aluminum alloy coated sheet stock useful for fabricating into easy-open ends for beverage containers. The method comprises the steps of providing a body of an aluminum base alloy consisting essentially of, by weight, 4.0 to 5.5% Mg, 0.2 to 0.7% Mn, 0.05 to 0.40% Cu, the balance being aluminum, incidental elements and impurities and rolling the body to produce an aluminum sheet stock. The sheet stock is subjected to a structure refining operation to precipitate finally divided magnesium containing constituent and thereafter the sheet stock is coated with an organic coating material and cured at a temperature sufficiently low and for a period of time to avoid dissolving the precipitated constituent to provide coated sheet stock having improved levels of tensile strength and high levels of formability.
REFERENCES:
patent: 4282044 (1981-08-01), Robertson et al.
patent: 4284437 (1981-08-01), Baba et al.
patent: 4582541 (1986-04-01), Dean et al.
"Registration Record of Aluminum Association Designations and Chemical Composition Limits for Wrought Aluminum and Wrought Aluminum Alloys", Aluminum Association, Inc., Washington, D.C., Jul. 1981.
Kaanta Henry W.
McBride John K.
Milner Milton W.
Perigo Terry A.
Sanders, Jr. Robert E.
Alexander Andrew
Aluminum Company of America
McDowell Robert L.
Rutledge L. Dewayne
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