ALUMINUM ALLOY BRAZING SHEET, METHOD FOR PRODUCING SAME AND HEAT EXCHANGER

Title:

ALUMINUM ALLOY BRAZING SHEET, METHOD FOR PRODUCING SAME AND HEAT EXCHANGER

Document Type and Number:

WIPO Patent Application WO/2017/018087

Kind Code:

A1

Abstract:

Provided are: an aluminum alloy brazing sheet which has good brazability and maintains high corrosion resistance after brazing; a method for producing this aluminum alloy brazing sheet; and a heat exchanger. An aluminum alloy brazing sheet which comprises a core material and a brazing filler material arranged on at least one surface of the core material, and which is characterized in that: the core material is composed of an Al-Mn system alloy or an Al-Mn-Cu system alloy; the brazing filler material is composed of an Al-Si-Zn system alloy containing 2-8% by mass of Si and 1-9% by mass of Zn; the liquid phase ratio X (%) of the brazing filler material at the brazing temperature and the brazing filler material thickness Y (μm) satisfy the following formulae (1)-(3), (1) 30 ≤ X ≤ 80, (2) Y ≥ 25 and (3) 1,000 ≤ X × Y ≤ 24,000; and the average length of α phases remaining in the brazing filler material on the core material after brazing is 80% or more of the thickness of the remaining brazing filler material and/or 70 μm or more. A method for producing this aluminum alloy brazing sheet; and a heat exchanger.

Inventors:

MATSUKADO KATSUHIRO
TSURUNO AKIHIRO
YAMADA SHOGO (JP)
TESHIMA SHOEI (JP)
IKEDA TOORU (JP)
NISHIYAMA KOUKI (JP)

Application Number:

PCT/JP2016/067891

Publication Date:

February 02, 2017

Filing Date:

June 16, 2016

Export Citation:

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Assignee:

KOBE STEEL LTD (JP)
DENSO CORP (JP)

International Classes:

B23K35/28; B23K35/40; B32B15/20; C22C21/02; F28F21/08

Domestic Patent References:

WO2010137649A1

2010-12-02

Foreign References:

JP2009155673A	2009-07-16
JP2011036914A	2011-02-24
JP2011224656A	2011-11-10
JP2014054656A	2014-03-27