ALUMINUM ALLOY BRAZING METHOD, AND ALUMINUM ALLOY MEMBER COVERED WITH FLUX COMPONENT

Title:

ALUMINUM ALLOY BRAZING METHOD, AND ALUMINUM ALLOY MEMBER COVERED WITH FLUX COMPONENT

Document Type and Number:

WIPO Patent Application WO/2014/065357

Kind Code:

A1

Abstract:

An aluminum alloy brazing method in which brazing is carried out by performing a fluxing process that applies a flux component to the surface of an aluminum alloy member, and then performing a brazing and heating step in which the aluminum alloy member coated with the flux component is brazed and heated, said method characterized in that the flux component is (A) fluoro zinc aluminate alkali metal salt powder represented by general formula (1), MwZnxAlyFz (in the formula, M is K or Cs, and w, x, y and z are positive integers, with the greatest common factor thereof being 1), and (A) is applied in the amount of 1 to 50 g/m2 to the aluminum alloy member in the fluxing process. According to the present invention, it is possible to provide a flux composition with which the problems of brazing defects and discoloration do not occur even when brazing under an atmosphere with a high oxygen concentration or an atmosphere with high humidity.

Inventors:

KUMAGAI HIDETOSHI (JP)
HISATOMI YUJI (JP)
YAMASHITA NAOKI (JP)

Application Number:

PCT/JP2013/078778

Publication Date:

May 01, 2014

Filing Date:

October 24, 2013

Export Citation:

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Assignee:

UACJ CORP (JP)

International Classes:

B23K1/19; B23K35/363; B23K3/00

Foreign References:

JP2005523163A	2005-08-04
JP2010075965A	2010-04-08
JP2010075966A	2010-04-08
JP2004042086A	2004-02-12
JP2006348372A	2006-12-28
JPS61293699A	1986-12-24
JP2006255755A	2006-09-28

Other References: