数値シミュレーション援用抵抗ろう付法によるTi-Ni合金とステンレス鋼のマイクロ接合

抄録

A novel resistance brazing method aided by a numerical simulation, in which the brazing is completed through several preliminary heating and a subsequent final heating aided by the numerical simulation, is presented. The preliminary heating is performed with a relatively low electric energy input so that the uniformity of the surface contact condition between two parts can be improved due to local melting and subsequent solidification, and so that the electric current data can be acquired for preparing analytical conditions necessary to the numerical simulation. The final heating is performed with an energizing condition determined by the numerical simulation in advance.
To prove the efficacy of the resistance brazing method aided by the numerical simulation, Ti-Ni alloy and type 304 stainless steel wires with diameters of 96μm both was butt-joint brazed using Au-Cu brazing filler metal supplied with the individual metal plating. The brazed joints had the tensile strengths ranging from 74 to 448MPa in accordance with the energizing conditions.