ALUMINUM ALLOY BRAZING SHEET, AND METHOD FOR PRODUCING HEAT EXCHANGER MADE FROM ALUMINUM ALLOY

WIPO Patent Application WO/2017/115597

A1

An aluminum alloy brazing sheet which can be used for brazing in an inert gas atmosphere without using any flux, said aluminum alloy brazing sheet being characterized by comprising an aluminum alloy core material and an aluminum alloy brazing material, wherein one surface or both surfaces of the aluminum alloy core material is/are cladded with the aluminum alloy brazing material, the aluminum alloy core material contains 0.8 to 1.8% by mass of Mn, 0.05 to 0.20% by mass of Mg and a remainder made up by aluminum and unavoidable impurities, the aluminum alloy brazing material contains 6 to 13% by mass of Si and a remainder made up by aluminum and unavoidable impurities, the thickness of the brazing sheet is 0.12 mm or less, and the thickness of the brazing material is 0.012 mm or less. According to the present invention, an aluminum alloy brazing sheet for fluxless brazing use can be provided, which does not undergo the problem of the buckling deformation of a tip part of a fin or the problem of a defect in the formation of a fillet during brazing by heating despite the sheet thickness of as small as 0.12 mm or less of the brazing sheet.

ITOH YASUNAGA (JP)
YAMAYOSHI TOMOKI (JP)
OONO SHINGO (JP)
SHIMAZU TOMOHIRO (JP)
TAKEWAKA SHIN (JP)

PCT/JP2016/085226

July 06, 2017

November 28, 2016

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UACJ CORP (JP)
DENSO CORP (JP)

C22C21/00; B23K1/00; B23K1/19; B23K35/28; B32B15/20; F28F21/08

WO2004108337A1	2004-12-16
WO2013168669A1	2013-11-14
WO2007083615A1	2007-07-26

JP2014185386A	2014-10-02
JP2004084060A	2004-03-18
JP2015526290A	2015-09-10
JPH10180489A	1998-07-07

AKATSUKA Kenji et al. (JP)

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