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. 27, 2012
Filed:
Jan. 28, 2005
Yoshito Oki, Shizuoka, JP;
Hideki Suzuki, Shizuoka, JP;
Haruo Sugiyama, Shizuoka, JP;
Toshiya Anami, Shizuoka, JP;
Tomohiro Sasaki, Shizuoka, JP;
Yoshito Oki, Shizuoka, JP;
Hideki Suzuki, Shizuoka, JP;
Haruo Sugiyama, Shizuoka, JP;
Toshiya Anami, Shizuoka, JP;
Tomohiro Sasaki, Shizuoka, JP;
Nippon Light Metal Company, Ltd., Tokyo, JP;
Abstract
[PROBLEMS] To provide an aluminum alloy fin material for a heat exchanger, which has high strength and high heat conductivity after brazing, and is excellent in the resistance to sagging, erosion and self-corrosion and the in the sacrificial anode effect. [MEANS FOR SOLVING PROBLEMS] A method for producing an aluminum alloy fin material for a heat exchanger which comprises providing a molten aluminum alloy having a chemical composition, in wt %, that Si: 0.5 to 1.5%, Fe: 0.15 to 1.00%, Mn: 0.8 to 3.0%, Zn: 0.5 to 2.5%, with the proviso that the content of Mg as an impurity is limited to 0.05 wt % or less, and the balance: Al and inevitable impurities, casting the molten alloy continuously into a thin slab having a thickness of 5 to 10 mm by the use of a twin belt casting machine, winding up the slab into a roll, cold-rolling the slab into a sheet having a thickness of 0.05 to 2.0 mm, subjecting the sheet to an inter annealing at 350 to 500° C., and cold-rolling the annealed sheet with a cold reduction rate of 10 to 96%, to prepare a sheet having a final thickness of 40 to 200 μm, and optionally subjecting the final sheet to a final annealing (a softening process) at a holding temperature of 300 to 400° C.