BRAZING SHEET FOR HEAT EXCHANGER, AND METHOD FOR MANUFACTURING SAID SHEET

Title:

BRAZING SHEET FOR HEAT EXCHANGER, AND METHOD FOR MANUFACTURING SAID SHEET

Document Type and Number:

WIPO Patent Application WO/2015/002315

Kind Code:

A1

Abstract:

　An aluminum alloy brazing sheet for a heat exchanger, and a method for manufacturing same, the brazing sheet having as a core material an Al alloy comprising 0.6-2.0 percent by mass of Mn, 0.05-0.5 percent by mass of Fe, 0.4-0.9 percent by mass of Si, and 0.02-4.0 percent by mass of Zn, the balance comprising Al and unavoidable impurities; and having as a surface material on both sides of the core material an Al alloy comprising 6.0-13.0 percent by mass of Si, 0.05-0.80 percent by mass of Fe, and 0.05-0.45 percent by mass of Cu, the balance comprising Al and unavoidable impurities. The ratio (A/B) of the number density (A) (grains/mm2) of Al-Mn-Fe or Al-Mn-Si precipitates in the core material, the precipitates having a grain size of at least 0.1 µm and no more than 3.0 µm, and the number density (B) (grains/mm2) of precipitates having a grain size of at least 3.0 µm satisfying the relation 50≤A/B≤500. The average crystal particle size of the core material in the longitudinal cross-section of a fin, after brazing heating, is at least 100 µm.

Inventors:

KANNO YOSHIMASA (JP)
TANAKA SATOSHI (JP)
FUJITA KAZUKO (JP)

Application Number:

PCT/JP2014/067974

Publication Date:

January 08, 2015

Filing Date:

July 04, 2014

Export Citation:

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Assignee:

UACJ CORP (JP)

International Classes:

C22C21/00; B23K35/22; B23K35/28; C22F1/04; F28F21/08; C22F1/00

Foreign References:

JP2005060790A	2005-03-10
JPH1017969A	1998-01-20
JP2010209444A	2010-09-24
JP2004084060A	2004-03-18
JP2005060790A	2005-03-10

Other References: