ACTIVE METAL BRAZING MATERIAL - TANAKA PRECIOUS METAL IND

Title:

ACTIVE METAL BRAZING MATERIAL

Document Type and Number:

WIPO Patent Application WO/2012/161148

Kind Code:

A1

Abstract:

The present invention is an active metal brazing material that is composed of an Ag-Cu-Ti-Sn alloy, which contains 20-40% by weight of Cu, 1.0-3.0% by weight of Ti and 1.2-6.0% by weight of Sn with the balance made up of Ag, and that has a metal structure wherein an Sn-Ti intermetallic compound or a Cu-Ti intermetallic compound is dispersed in an Ag-Cu alloy matrix. The weight ratio of Sn to Ti, namely Sn/Ti is 1.2 or more, and the intermetallic compound has a particle diameter of 20 μm or less. This active metal brazing material improves the workability of conventionally known Ag-Cu-Ti alloy active metal brazing materials, and enables working in micro dimensions at high working rate. This active metal brazing material can be produced by performing plastic working at a working rate of 90% or more after melting/casting the Ag-Cu-Ti-Sn alloy having the above-described composition, thereby miniaturizing the intermetallic compound.

Inventors:

KISHIMOTO TAKAOMI (JP)
KASHIWAGI KOUZOU (JP)
SAKAGUCHI OSAMU (JP)

Application Number:

PCT/JP2012/062890

Publication Date:

November 29, 2012

Filing Date:

May 21, 2012

Export Citation:

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Assignee:

TANAKA PRECIOUS METAL IND (JP)
KISHIMOTO TAKAOMI (JP)
KASHIWAGI KOUZOU (JP)
SAKAGUCHI OSAMU (JP)

International Classes:

B23K35/30; B23K35/40; C04B37/00; C04B37/02; C22C5/06; C22F1/14; C22F1/00

Domestic Patent References:

WO2005007596A1

2005-01-27

Foreign References:

JPH08310876A	1996-11-26
JPS6182995A	1986-04-26
JP2002292490A	2002-10-08
JPH10236886A	1998-09-08
JPH0716789A	1995-01-20

Other References: