| 摘要 |
PROBLEM TO BE SOLVED: To provide a flux-cored wire for gas-shielded arc welding, which forms an excellent bead shape of horizontal fillet weld when used in semiautomatic welding, and further forms an excellent bead shape of fillet weld even when used in vertical downward welding or welding in an overhead position. SOLUTION: The flux-cored wire for gas-shielded arc welding contains, relative to the total mass of the wire, 2.5-3.9% of Ti oxide in terms of TiO<SB>2</SB>, 0.6-1.1% of Si oxide in terms of SiO<SB>2</SB>, 0.1-0.6% of Zr oxide in terms of ZrO<SB>2</SB>, 0.4-1.2% of Fe oxide in terms of FeO, 0.4-0.9% of Al, 0.5-1.5 of Al/FeO, which is the ratio of Al and Fe oxide in terms of FeO, 0.03-0.20% in total of Na compound in terms of Na<SB>2</SB>O and K compound in terms of K<SB>2</SB>O, 0.01-0.15% of fluorine compound in terms of F, and further, if necessary, 0.005-0.040% of one or both of Bi and Bi oxide in terms of Bi. COPYRIGHT: (C)2008,JPO&INPIT
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