Metal treatment – Process of modifying or maintaining internal physical... – Heating or cooling of solid metal
Patent
1997-02-21
1999-03-30
Wyszomierski, George
Metal treatment
Process of modifying or maintaining internal physical...
Heating or cooling of solid metal
148693, 148694, 148417, 148439, 420532, 420534, 420541, C22F 1043
Patent
active
058883207
ABSTRACT:
A method of producing an aluminum product having high formability high fracture toughness, high strength and improved corrosion resistance, the method comprising: (a) providing stock including an aluminum base alloy consisting essentially of about 0.7 to 1.0 wt. % silicon, not more than about 0.3 wt. % iron, not more than about 0.5 wt. % copper, about 0.8 to 1.1 wt. % magnesium, about 0.3 to 0.4 wt. % manganese, and about 0.5 to 0.8 wt. % zinc, the remainder substantially aluminum, incidental elements and impurities; (b) homogenizing the stock at a temperature ranging from about 950.degree. to 1050.degree. F. for a time period ranging from about 2 to 20 hours; (c) hot rolling at a temperature ranging from about 750.degree. to 950.degree. F. will increase; (d) solution heat treating at a temperature ranging from about 1000.degree. to 1080.degree. F. for a time period ranging from about 5 minutes to one hour; (e) cooling by quenching at a rate of about 1000.degree. F./second to a temperature of 100.degree. F. or lower; and (f) artificially aging by reheating to a temperature ranging from about 300.degree. to 400.degree. F. for a time period ranging from about 2 to 20 hours to produce a T6 temper in the aluminum product.
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Chaudhuri, et al., "Comparison of Corrosion-Fatigue Properties of 6013 Bare, Alclad 2024, and 2024 Bare Aluminum Alloy Sheet Materials", Journal of Materials Engineering and Performance, vol. 1, Feb. 1992, pp. 91-96.
Haynes Gerald D.
Kaiser Aluminum & Chemical Corporation
McGarrigle Philip L.
Wyszomierski George
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