Planar, rolled semi-finished product of aluminum alloys

Details Planar, rolled semi-finished product of aluminum alloys Planar, rolled semi-finished product of aluminum alloys

2004-03-31

2010-12-07

Wyszomierski, George (Department: 1793)

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

C148S702000

Reexamination Certificate

active

07846277

ABSTRACT:
A flat, rolled semi-finished product made of an aluminum alloy and a method of producing the product are disclosed. The aluminum alloys has the following alloy proportions in weight percentages: 2≦Mg≦5, Mn≦0.5, Cr≦0.35, Si≦0.4, Fe≦0.4, Cu≦0.3, Zn≦0.3, Ti≦0.15, other elements totaling no more than 0.15 and separately not exceeding 0.05, and the remainder consists of Al. The semifinished product is rolled from a bar and, during the rolling process, is subjected to at least one intermediate tempering between two cold reduction passes and to a final soft-annealing in a chamber furnace. A semi-finished product of this type does not have any flow lines after shaping or deep-drawing if the degree of reshaping before the first intermediate tempering is equal to at least 50%, the degree of reshaping before the final soft-annealing is no greater than 30%, and the semifinished product is drawn by 0.1 to 0.5% after the final soft-annealing.

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