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. 10, 2012
Filed:
Mar. 23, 2007
Manabu Nakai, Kobe, JP;
Yoshiya Inagaki, Inabe, JP;
Atsumi Fukuda, Inabe, JP;
Kobe Steel, Ltd., Kobe-shi, JP;
Abstract
The present invention provides an aluminum alloy forging material having enhanced strength, toughness, and corrosion resistance, and a method of producing the material. An aluminum alloy forging materialproduced with specified components under specified conditions has an arm portionincluding a relatively narrow and thick peripheral riband a thin and relatively wide central webhaving a thickness of 10 mm or less and having a substantially H-shaped sectional form. In a width-direction section of a maximum stress producing site of the rib, the density of crystals observed in the structure of a sectional portionwhere the maximum stress is produced, the spacing of grain boundary precipitates and the size and density of dispersed particles observed in the structure of a sectional portionincluding a parting line, the recrystallization ratio observed in each of the sectional portionsandof the rib, and the recrystallization ratio observed in a sectional portionof the webadjacent to the sectional structure of the ribin the width direction are defined for enhancing the strength, toughness, and corrosion resistance of the aluminum alloy forging material.