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:
May. 13, 2003
Filed:
Sep. 18, 2000
Shigeru Mikubo, Fukuoka, JP;
Masafumi Mizouti, Fukuoka, JP;
Yasuyuki Murayama, Fukuoka, JP;
Tsunaki Iwashita, Fukuoka, JP;
Akihiko Kamio, Tokyo, JP;
Tatsuo Sato, Tokyo, JP;
Kyusyu Mitsui, Aluminum Co., Ltd., Fukuoka, JP;
Abstract
A process for producing an aluminum alloy semi-molten billet for use as a transporation unit, including the steps of: producing an aluminum alloy having a composition consisting essentially of, in weight %, 0.5 or less Cu, 5.0 to 10.0 Si, 0.2 to 0.7 Mg, 0.35 or less Zn, 0.55 or less Fe, 0.5 or less Mn, 0.005 to 0.5 Ti, and the balance aluminum; introducing working strain into a melt of the aluminum alloy by means of molding flask-assisted cold forging at a distortion rate of 10 to 40%, at a working introduction velocity of 10 mm or less per second, and at a temperature of 200° C. or lower; and, thereafter heat-treating such a strain introduced melt at temperatures in a range of 576 to 585° C.