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. 19, 2011
Filed:
Nov. 09, 2009
Hideo Sano, Nagoya, JP;
Yasuaki Yoshino, Kakamigahara, JP;
Hideo Sano, Nagoya, JP;
Yasuaki Yoshino, Kakamigahara, JP;
The Society of Japanese Aerospace Companies, Minato-ku, Tokyo, JP;
Kawasaki Jukogyo Kabushiki Kaisha, Kobe-shi, Hyogo, JP;
Sumitomo Light Metal Industries, Ltd., Minato-ku, Tokyo, JP;
Abstract
The present invention provides a high-strength aluminum alloy extruded product exhibiting excellent corrosion resistance and secondary workability and suitably used as a structural material for transportation equipment such as automobiles, railroad vehicles, and aircrafts, and a method of manufacturing the same. The aluminum alloy extruded product has a composition containing 0.6 to 1.2% of Si, 0.8 to 1.3% of Mg, and 1.3 to 2.1% of Cu while satisfying the following conditional expressions (1), (2), (3) and (4),3%≦Si %+Mg %+Cu %≦4%  (1)Mg %≦1.7×Si %  (2)Mg %+Si %≦2.7%  (3)Cu %/2≦Mg %≦(Cu %/2)+0.6%  (4)and further containing 0.04 to 0.35% of Cr, and 0.05% or less of Mn as an impurity, with the balance being aluminum and unavoidable impurities. The cross section of the extruded product has a recrystallized structure with an average grain size of 500 μm or less.