| 摘要 |
PROBLEM TO BE SOLVED: To provide a flux cored wire for gas shielded arc welding suitable to two electrode high speed horizontal fillet welding for a black skin steel sheet which can obtain a satisfactory bead shape reduced in the adhesion amount of spatters and free from undercut and the swelling of a toe part. SOLUTION: The flux cored wire includes: C of≤0.03 mass% in the outer skin made of steel; flux, by mass% to the whole wire, containing a Ti oxide of 1.8 to 2.8% by a value expressed in terms of TiO<SB>2</SB>, a Si oxide of 0.4 to 1.0% by a value expressed in terms of SiO<SB>2</SB>, a Zr oxide of 0.2 to 0.5% by a value expressed in terms of ZrO<SB>2</SB>and a Fe oxide of 0.1 to 0.6% by a value expressed in terms of FeO; the total of the outer skin made of steel and flux, containing 0.3 to 1.2% Si, 1.5 to 3.5% Mn, 0.4 to 1.0% Al, Na and K in the total of a value expressed in terms of Na<SB>2</SB>O and a value expressed in terms of K<SB>2</SB>O by 0.10 to 0.25%, a fluorine compound of 0.02 to 0.08% by a value expressed in terms of F; and the balance Fe component. COPYRIGHT: (C)2009,JPO&INPIT
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