HIGH STRENGTH ALUMINUM ALLOY FIN MATERIAL FOR HEAT EXCHANGER AND METHOD FOR PRODUCTION THEREOF

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)

Application Number:

PCT/JP2005/001195

Publication Date:

August 18, 2005

Filing Date:

January 28, 2005

Export Citation:

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Assignee:

NIPPON LIGHT METAL CO (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: