PURPOSE: To obtain a defectless joint part by combining specifically a welding power source, heat source, shielding gas and welding rod or electrode wire so that only the Al base metal side and welding rod are melted and that the Ti base metal side is hardly melted.
CONSTITUTION: An arc 5 is generated between an electrode 6 of a torch 7 and base metals 1, 2 for the butt parts of the base metal 1 consisting of an Al alloy and the base metal 2 consisting of Ti. The TIG arc by a DC power source of a straight polarity or AC power source AC as a welding power source P or the MIG arc by a DC power source of a reversel polarity is used as a heat source for the arc 5. Al or the alloy thereof, phosphor copper solder or silver alloy contg. ≥20% (by weight) Al is used as the welding rod or electrode wire. Gaseous Ar 8 is used as the shielding gas. The weld metal 3 formed in the joint parts between the base metals 1 and 2 has the compsn. in which the Al base metal 1 and the welding rod 4 are mixed.
NANBA KEIZOU
SANO HIROMICHI
| JPS57187180A | 1982-11-17 |