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:
Apr. 02, 1996
Filed:
Mar. 30, 1994
Kenneth D Wade, Midlothian, VA (US);
Michael H Skillingberg, Richmond, VA (US);
Reynolds Metals Company, Richmond, VA (US);
Abstract
In a method of extruding a 6000-series-type aluminum alloy by casting, homogenizing, extruding and optionally, aging and/or heat treating, an alloy composition is provided having silicon 0.6-1.2 wt. %, magnesium 0.7-1.2 wt. %, copper 0.3-1.1 wt. %, manganese 0.1-0.8 wt. %, zirconium 0.05-0.25 wt. %, up to 0.5 wt. % iron, up to 0.15 wt. % chromium, up to 0.25 wt. % zinc, up to 0.10 wt. % titanium with the balance aluminum and incidental impurities wherein an effective amount of zirconium, in combination with effective amounts of manganese, produces a fibrous grain structure which contributes to a combination of high strength and fracture toughness in the extruded alloy. The fibrous grain structure also permits improvements in forming the extrusion by enabling lower temperatures to be utilized during the homogenization step. In extruding this 6000-series-type aluminum alloy, a final product is produced having improved combinations of strength and fracture toughness for use in structural applications or the like.