レーザ溶接したアルミニウム合金板材の溶接変形に及ぼすシールドガスの影響

概要

論文の詳細を見る
Aluminum alloy sheets of A5052-O were welded under various welding conditions using a CW YAG laser with a constant output power of 1500W. The effect of shielding gas on the welding distortion of the aluminum alloy sheets was investigated in connection with the heat input to the aluminum alloy sheets during the laser welding. The heat input was evaluated from the numerical results performed using a thermal FEM analysis and the experimental data of weld bead widths. As for the case where nitrogen gas is used as shielding gas, the heat input becomes greater than that of the case where argon gas is used as shielding gas. In addition, regardless of shielding gas, the heat input increases with the increase of shielding gas flow rate. The welding distortion, the quantity of which is specified by the maximum angular distortion and the maximum deflection along welding line, increases with the increase of heat input.
福井大学の論文
2004-09-30