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:
Mar. 28, 2006
Filed:
Jun. 23, 2003
Taketoshi Toyama, Anjo, JP;
Koji Hirao, Nishio, JP;
Takashi Hatori, Kariya, JP;
Yuji Hisatomi, Kasugai, JP;
Yasunaga Itoh, Nagoya, JP;
Yoshifusa Shoji, Nagoya, JP;
Taketoshi Toyama, Anjo, JP;
Koji Hirao, Nishio, JP;
Takashi Hatori, Kariya, JP;
Yuji Hisatomi, Kasugai, JP;
Yasunaga Itoh, Nagoya, JP;
Yoshifusa Shoji, Nagoya, JP;
Denso Corporation, Kariya, JP;
Sumitomo Light Metal Industries, Ltd., Tokyo, JP;
Abstract
The present invention provides an aluminum alloy fin material for heat exchangers which has a thickness of 80 μm (0.08 mm) or less and excels in joinability to a tube material and in intergranular corrosion resistance. The aluminum alloy fin material is an aluminum alloy bare fin material or a brazing fin material which has a thickness of 80 μm or less and is incorporated into a heat exchanger made of an aluminum alloy manufactured by brazing through an Al—Si alloy filler metal. The structure of the core material before brazing is a fiber structure, and the crystal grain diameter of the structure after brazing is 50–250 μm. The Si concentration in the Si dissolution area on the surface of the fin material and at the center of the thickness of the fin material after brazing is preferably 0.8% or more and 0.7% or less, respectively.