The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 30, 1996
Filed:
Oct. 24, 1994
Mamoru Matsuo, Tokyo, JP;
Tsutomu Tagata, Tokyo, JP;
Sky Aluminum Co., Ltd., Tokyo, JP;
Abstract
An aluminum-alloy rolled sheet is cold preformed and then superplastically formed by: providing a composition which consists of from 2.0 to 8.0% of Mg, from 0.0001 to 0.01% of Be, and at least one element selected from the group consisting of from 0.3 to 2.5% of Mn, from 0.1 to 0.5% of Cr, from 0.1 to 0.5% of Zr, and from 0.1 to 0.5% of V, less than 0.2% of Fe as impurities, as well as aluminum and unavoidable impurities in balance; providing an unrecrystallized structure formed by annealing at a temperature of from 150.degree. to 240.degree. C. for 0.5 to 12 hours or at a temperature of from 250.degree. to 340.degree. C. for 0 to 5 minutes; providing draft of final cold-rolling amounting to 50% or more; and, providing 7% or more of elongation at normal temperature.