Method of manufacturing aluminum articles having improved bake h

Details Method of manufacturing aluminum articles having improved bake h Method of manufacturing aluminum articles having improved bake h

1995-05-30

1997-09-02

Wyszomierski, George

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

148693, 148694, 148700, C22F 1043

Patent

active

056627505

ABSTRACT:
A method of producing an aluminum article comprising the steps of: (a) providing stock including an aluminum alloy comprising about 1.0 to 1.3 wt.% silicon, about 0.40 to 0.80 wt.% magnesium, about 0.02 to 0.20 wt.% of an element selected from the group consisting of manganese and chromium, not more than about 0.70 wt.% copper, the remainder substantially aluminum, incidental elements and impurities; (b) hot rolling the stock at a temperature ranging from about 980.degree. to 1025.degree. F. to obtain a gauge thickness ranging from about 0.20 to 0.10 inches; (c) solution heat treating at a temperature ranging from about 1000.degree. to 1030.degree. F. for a time period of about 3 to 10 minutes; (d) rapid quenching at a rate of about 500.degree. F./second to a threshold temperature of about 200.degree. F. for a time period ranging from about 2 to 10 minutes; (e) cooling to room temperature at a rate above 1.8.degree. F./second; (f) holding at room temperature for not more than 6 hours; and (g) reheating to a temperature of about 200.degree. F. for a time period of about an hour.

REFERENCES:
patent: 4718948 (1988-01-01), Komatsubara et al.
patent: 4784921 (1988-11-01), Hyland et al.
patent: 4808247 (1989-02-01), Komatsubara et al.
patent: 4897124 (1990-01-01), Matsuo et al.
patent: 5266130 (1993-11-01), Uchida et al.

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