ALUMINUM ALLOY FIN MATERIAL FOR HEAT EXCHANGERS WHICH HAS EXCELLENT BUCKLING RESISTANCE, AND METHOD FOR PRODUCING SAME

WIPO Patent Application WO/2019/244411

A1

An aluminum alloy fin material for heat exchangers which has high strength and excellent buckling resistance is provided as a fin material which has excellent moldability during a corrugation processing and also has proper pre-brazing strength suitable for easy molding into a fin even when the fin material is thinned so as to have a final thickness of 30 to 80 μm, and which exhibits proper self corrosion resistance and a proper sacrificial anode effect and can constitute a working fluid passage. The fin material contains, in % by mass, 1.3% to 1.6% of Si, 0.30% to 0.70% of Fe, 1.8% to 2.3% of Mn, 0.5% to 2.0% of Zn and 0.002% to 0.10% of Ti, also contains, as impurities, Mg in a limited amount of 0.05% or less and Cu in a limited amount of 0.06% or less, also contains a remainder made up by unavoidable impurities and Al, has a final thickness of 30 to 80 μm, tensile strength of 260 MPa or less and a solidus temperature of 615°C or higher, and also has tensile strength of 170 MPa or more and a spontaneous potential of -780 to -700 mV when measured after being brazing-heated and then cooled.

KOKUBO TAKANORI (JP)
ANAMI TOSHIYA (JP)
SHIMOSAKA DAISUKE (JP)
SHINODA TAKAHIRO (JP)
NAKASHITA KOICHI (JP)
YAMAMOTO TETSUYA (JP)

PCT/JP2019/008060

December 26, 2019

March 01, 2019

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NIPPON LIGHT METAL CO (JP)
DENSO CORP (JP)

C22C21/00; F28F21/08; C22F1/04

WO2015141698A1	2015-09-24
WO2005075691A1	2005-08-18
WO2014034212A1	2014-03-06

JPH0770685A

1995-03-14

AOKI, Atsushi et al. (JP)

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