| 摘要 |
PROBLEM TO BE SOLVED: To provide a flux cored wire for gas shielded arc welding which is satisfactory in welding workability in all posture welding and obtaining weld metal having excellent low temperature toughness. SOLUTION: The flux cored wire for gas shielded arc welding formed by filling a flux into a steel envelope contains, in total mass% of the wire, 0.03 to 0.08% C, 0.01 to 0.4% Si, 1.2 to 2.5% Mn, 0.2 to 0.8% Mg, 0.001 to 0.015% B, in total of the steel envelope and the flux, contains 4 to 7% TiO<SB>2</SB>and 0.01 to 0.5% SiO<SB>2</SB>in the flux, contains≤0.2% Ti,≤0.03% Al,≤0.5% Al<SB>2</SB>O<SB>3</SB>,≤1% ZrO<SB>2</SB>,≤0.3% metal fluoride in terms of F, in addition 0.05 to 2.3 of SiO<SB>2</SB>+2xSi+50xAl, the balance consists of Fe of the steel envelope, an Fe component of iron powder and iron alloy powder, an arc stabilizer, and inevitable impurities. COPYRIGHT: (C)2010,JPO&INPIT
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