MAG welding wire for high strength thin steel sheet and pulse MAG welding method using the same

摘要

PROBLEM TO BE SOLVED: To provide an MAG welding wire for high-strength steel sheets, wherein, when welding a lap joint part or T joint part of a high-strength steel sheet, the arc is stable, the amounts of sputtering and slag generation are small, drop of weld metal is prevented even with a large gap, the bead appearance is good, and excellent strength of the weld metal is obtained, and a pulse MAG welding method using the same.SOLUTION: The present invention provides an MAG welding wire for a high-strength steel sheet with a thickness of 1.2-3.2 mm. The MAG welding wire contains, in mass% based on the total wire mass, C: more than 0.20-0.50%, Si: 0.05-0.20%, Mn: 1.5-2.5%, and Mo: 0.3-0.6%, with P: 0.03% or less and S: 0.03% or less, with the balance being Fe and unavoidable impurities.SELECTED DRAWING: None