ACTIVE METAL BRAZING MATERIAL

摘要

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.