ALUMINUM BRAZING SHEET - MITSUBISHI ALUMINIUM

Title:

ALUMINUM BRAZING SHEET

Document Type and Number:

WIPO Patent Application WO/2020/153103

Kind Code:

A1

Abstract:

This aluminum brazing sheet has a multilayer structure containing at least two layers. An Al-Si-Mg-Bi-B-based brazing material containing 0.01-2.0% of Mg, 1.5-14.0% of Si, 0.005-1.5% of Bi and 0.005-0.2% of B in terms of mass% is clad on one surface or both surfaces of a core material. When a Mg-Bi-based compound contained in the brazing material is observed in a surface layer direction (RD-TD), the number of particles having circle-equivalent diameters of not less than 0.01 μm and less than 5.0 μm is more than 10 per observed 10,000 μm2, and the number of particles having diameters of 5.0 μm or more is less than 2 per observed 10,000 μm2. In surface layer direction observations, the number of coarse Bi simple substance particles having circle-equivalent diameters of 5.0 µm or more contained in the brazing material is less than 5 per observed 10,000 μm2, and the number of coarse Si particles having long side lengths of 50 µm or less is 3 or less per 1,000,000 μm2.

Inventors:

MIYAKE HIDEYUKI (JP)
YOSHINO MICHIHIDE (JP)
YAGUCHI KENICHI (JP)
MATSUSHITA AKIRA (JP)

Application Number:

PCT/JP2019/051412

Publication Date:

July 30, 2020

Filing Date:

December 27, 2019

Export Citation:

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Assignee:

MITSUBISHI ALUMINIUM (JP)

International Classes:

B23K35/22; C22C21/00; B23K35/28

Foreign References:

JP2014050861A	2014-03-20
JP4547032B1	2010-09-22
JP2012050992A	2012-03-15
JP2014155955A	2014-08-28