ALUMINUM BRAZING SHEET FOR FLUXLESS BRAZING USE

Title:

ALUMINUM BRAZING SHEET FOR FLUXLESS BRAZING USE

Document Type and Number:

WIPO Patent Application WO/2021/199732

Kind Code:

A1

Abstract:

The present invention is a brazing sheet for fluxless brazing use, characterized by having a multi-layer structure composed of at least two layers including at least one core material layer and one brazing material layer, in which the brazing material layer is provided on one surface or both surfaces of the core material layer and is positioned as an outermost surface, the brazing material layer comprises an Al-Si-Mg-X-based brazing material which contains, in % by mass, 0.05 to 2.0% of Mg and 2.0 to 14.0% of Si and also contains 0.01 to 0.3% of at least one element selected from Bi, Ga, Sn, In and Pb in which the total amount of Bi, Ga, Sn, In and Pb is 0.5% or less, the area ratio of MgO in an oxide coating film on the surface of the Al-Si-Mg-X-based brazing material is 2% or less, and the area ratio of a region occupied by MgO having crystallinity among the MgO in the oxide coating film is 4% or less. Provided that X represents at least one element selected from Bi, Ga, Sn, In and Pb.

Inventors:

YOSHINO MICHIHIDE (JP)
MIYAKE HIDEYUKI (JP)
CHIBA HAJIME (JP)

Application Number:

PCT/JP2021/005499

Publication Date:

October 07, 2021

Filing Date:

February 15, 2021

Export Citation:

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Assignee:

MITSUBISHI ALUMINIUM (JP)
MITSUBISHI MATERIALS CORP (JP)

International Classes:

B23K35/28; B23K35/22; C22C21/00; C22F1/00; C22F1/043

Foreign References:

JP2013220461A	2013-10-28
JPH05228684A	1993-09-07
JP2001303161A	2001-10-31
JPH06182582A	1994-07-05
JP2019013981A	2019-01-31
JP2020065307A	2020-04-23
JP4547032B1	2010-09-22
JP2014050861A	2014-03-20

Other References: