| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a reformative welding method attaining all matters such as high-speed welding by a two-electrode welding system, suppression of total spatter amount by reducing arc interference, improvement of usability, sure wire welding, generation of a high toughness welded metal, low heat input and high deposition and the like. <P>SOLUTION: In the two-electrode welding method, a preceding electrode is adapted to perform gas shield arc welding, a succeeding electrode is a conduction filler, a succeeding electrode wire 4b is protruded from a guide lead 7 or a guide tip 8 having no conducting function and having only a function of determining an insertion position into a molten pool M, and conduction is performed by a conduction tip 6b, a distance D<SB POS="POST">L</SB>between the conduction tip 6b and on a welded surface is at least 100 mm and not more than 1,500 mm, an inter-electrode distance D<SB POS="POST">E</SB>is not more than 10 mm, a current of the preceding electrode is at least 250 A. a current of the succeeding electrode is at least 10 A and not more than 50% of the current of the preceding electrode, and a feed speed of the succeeding electrode wire 4b is at least 20% and not more than 50% of a feed speed of a preceding electrode wire 4a. <P>COPYRIGHT: (C)2013,JPO&INPIT |
