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:
Sep. 30, 2003
Filed:
Jul. 09, 1999
Oddvin Reiso, Sunndalsøra, NO;
Ulf Tundal, Sunndalsøra, NO;
John Erik Hafsås, Sunndalsøra, NO;
Oddgeir Sjøthun, Sunndalsøra, NO;
Norsk Hydro ASA, Oslo, NO;
Abstract
The present invention concerns procedures for producing an alloy from a eutectic alloy system, in order to form a workpiece for rolling or extrusion purposes by, for example, producing an Al—Mg—Si alloy, which can be precipitation-hardened, which alloy, after having been heated to a temperature above the solubility temperature of phases which can be precipitated, is kept at this temperature until the phases have dissolved and is cooled at a cooling rate which is rapid enough to avoid most of the precipitation of the phases and slow enough to avoid most of the precipitation of dispersoid particles. At cooling rates within this interval, most coarse phases which have a reductive effect on the processing rate can be avoided and, at the same time, the number of small dispersoid particles which have a reductive effect on the mechanical properties after hardening is limited.