Temperature profiles of welding arcs and its interpretation

摘要: Summary form only given. Pulsed gas metal arc welding is a widespread and established joining technology. Improvements of efficiency join quality can be obtained by reducing focusing the heat input into workpiece. The energy transfer takes place mostly during high-current phase. Its spatial distribution depends on property profiles those root at weld pool surface. Radial temperature different distances from in phase several pulsed processes under shielding gases have been determined optical emission spectroscopy. In addition, plasma composition and, particular, density vapour deduced. Therefore, absolutely calibrated spectral radiances atom lines species recorded analysed over cross section. shape, assumed as nearly rotational symmetric, its dynamic behaviour spectroscopic recording controlled high-speed