Title:
HIGH STRENGTH ALUMINUM ALLOY FIN MATERIAL FOR HEAT EXCHANGER AND METHOD FOR PRODUCTION THEREOF
Document Type and Number:
WIPO Patent Application WO/2005/075691
Kind Code:
A1
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 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 1.0 %, Mn: 0.8 to 3.0 %, Zn: 0.5 to 2.5 %, with the proviso that the content of Mg as an impurity in limited to 0.05 wt% or less, and the balance: Al and ordinary 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 intermediate annealing at 350 to 500°C, and cold-rolling the annealed sheet with a cold rolling draft 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 treatment) at a holding temperature of 300 to 400°C.
Inventors:
OKI YOSHITO (JP)
SUZUKI HIDEKI (JP)
SUGIYAMA HARUO (JP)
ANAMI TOSHIYA (JP)
SASAKI TOMOHIRO (JP)
SUZUKI HIDEKI (JP)
SUGIYAMA HARUO (JP)
ANAMI TOSHIYA (JP)
SASAKI TOMOHIRO (JP)
Application Number:
PCT/JP2005/001195
Publication Date:
August 18, 2005
Filing Date:
January 28, 2005
Export Citation:
Assignee:
NIPPON LIGHT METAL CO (JP)
OKI YOSHITO (JP)
SUZUKI HIDEKI (JP)
SUGIYAMA HARUO (JP)
ANAMI TOSHIYA (JP)
SASAKI TOMOHIRO (JP)
OKI YOSHITO (JP)
SUZUKI HIDEKI (JP)
SUGIYAMA HARUO (JP)
ANAMI TOSHIYA (JP)
SASAKI TOMOHIRO (JP)
International Classes:
B21B1/22; B21B1/28; B21B3/00; B22D11/00; B22D11/06; C22C21/00; C22C21/02; C22C21/10; C22F1/00; C22F1/04; C22F1/043; C22F1/053; F28F21/08; (IPC1-7): C22C21/00; C22F1/00; C22F1/04; B21B1/22; B21B3/00; B22D11/00; B22D11/06; F28F21/08
Foreign References:
JP2002161323A | 2002-06-04 | |||
JPH01247542A | 1989-10-03 |
Other References:
See also references of EP 1717327A4
Attorney, Agent or Firm:
Sonoda, Yoshitaka (53rd Floor Shinjuku Mitsui Building, 1-1,
Nishi-Shinjuku 2-chom, Shinjuku-ku Tokyo 53, JP)
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