| 摘要 |
PURPOSE:To prevent blowhole defect surely in a method that makes TIG welding while applying pulsating current in a filler wire by adjusting current width and frequency of the pulsating current properly. CONSTITUTION:In a method that makes TIG welding while applying pulsating cuttent in the filler wire, the ratio of difference and sum of high current side current value (IP) and low current side current value (IB) of pulsating current [(IP-IB)/(IP+IB)] is made larger than 0.45 and frequency band is made 10-75Hz. A power source having external output characteristic larger than 20(volt)/100 (ampere) in the ratio of output voltage to output current is used as a power source connected to the filler wire. |
