FLUX-CORED ARC WELDING WIRE FOR PROVIDING SUPERIOR TOUGHNESS AND WELDABILITY TO A WELDED JOINT AT A LOW TEMPERATURE, AND WELDED JOINT USING SAME

摘要

Provided are a flux cored arc welding wire able to improve low-temperature toughness of a weld joint and a weld joint using the same, in which the flux cored arc welding wire includes 0.01 wt% to 0.1 wt% of carbon (C), 0.3 wt% to 1.4 wt% of silicon (Si), 1.0 wt% to 3.0 wt% of manganese (Mn), 4.0 wt% to 7.5 wt% of titanium (Ti)+TiO, 0.01 wt% to 3.0 wt% of nickel (Ni), 0.01 wt% to 0 . 2 wt% of boron (B), 0 . 02 wt% to 0 . 42 wt% of yttrium (Y) or 0.02 wt% to 0.56 wt% of a rare earth metal (REM), and iron (Fe) as well as other unavoidable impurities as a remainder.