| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of tandem arc welding, which method can use already popularized robot systems and welding wires, and can achieve sufficient fatigue strength of joined portions at a low cost and a high speed besides a traditional low speed. SOLUTION: The method of tandem arc welding uses shielding gas and forms one molten pool P for welding by means of two electrodes (L electrode EL and T electrode ET), and employs a first welding wire (welding wire W1 or W2), which is a ferrous wire satisfying the following conditions about the content of Ni and Mn, 0.50(mass%)≤äNi(mass%)+Mn(mass%)}≤6.00(mass%), and a second welding wire (welding wire W2 or W1), which is a wire satisfying the following conditions about the content of Ni and Mn, 11.00(mass%)≤äNi(mass%)+Mn(mass%)}≤50.00(mass%). COPYRIGHT: (C)2008,JPO&INPIT |
