FLUX-CORED WIRE FOR MULTI-ELECTRODE SUBMERGED ARC WELDING

摘要

PROBLEM TO BE SOLVED: To provide a flux-cored wire that is used for welding by a multi-electrode SAW (submerged arc welding) method with three or more electrodes, which is applied to secure HAZ (heat affected zone) toughness, and that is excellent in economic productivity.;SOLUTION: The flux-cored wire is used for multi-electrode submerged arc welding where three or more electrodes are used, and has a wire diameter of 3.2 mm or less. The flux-cored wire for submerged arc welding contains, by mass% with respective to the total mass of the wire, 0.04-0.22% C, 0.1-0.6% Si, 1.0-3.0% Mn, 4.0-10.0% Ni, 3.0% or less Mo, 0.01-0.25% Ti, 0.01-0.5% REM, and the balance Fe with inevitable impurities in the total of a steel shell and/or a filler flux, wherein a filling factor of the filler flux relative to the total mass of the wire is 10-40 mass%.;COPYRIGHT: (C)2013,JPO&INPIT