C - Chemistry – Metallurgy – 22 – F
Patent
C - Chemistry, Metallurgy
22
F
148/10
C22F 1/04 (2006.01) C22C 21/04 (2006.01) C22C 21/08 (2006.01) C22F 1/05 (2006.01)
Patent
CA 1097196
ABSTRACT OF THE DISCLOSURE There are a number of applications for thin sheet aluminum. Such material must have good deep drawing properties, durability, and strength. Additionally, the aluminum alloy must have a sufficiently low cost for deformation to permit the production of a competative product. The present invention seeks to achieve this desiderata by providing a process for fabricating high strength, improved formability, low earing aluminum strip, sheet and foil from age hardenable aluminum alloys of the Al-Si-Mg type, comprising: (A) forming an aluminum alloy melt composition consisting essentially of from about 1.0 to 1.8 weight percent silicon, from about 0.2 to 0.6 weight percent magnesium, and the balance essentially aluminum; (B) casting said alloy in strip form; (C) hot rolling said cast strip to a first thickness; (D) cold rolling said hot rolled strip to an intermediate thickness; and (E) annealing said cold rolled strip to intermediate thickness at a temperature of from about 450°C to about 550°C so as to provide an aluminum alloy matrix characterized by undissolved, finely dispersed silicon particles whose size is in the lower zone of the wavelengths of visible light so as to obtain good deformability and strong age hardening characteristics. The resulting sheet material is useful in the manufacture of cans and can covers.
293954
Lenz Dieter
Tragner Erich
Fetherstonhaugh & Co.
Swiss Aluminium Ltd.
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