| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a flux-cored wire for gas shielded arc welding which is excellent in welding work efficiency in all attitude welding, and excellent in the strength and low-temperature toughness of weld metal after AW and PWHT, and can prevent the strength after PWHT from drastically degrading relative to that of AW. <P>SOLUTION: This flux-cored wire contains, by mass% with respect to wire total mass, 0.02-0.08% of C, 0.1-1.0% of Si, 1.0-2.5% of Mn, 0.1-3.0% of Ni, 0.002-0.015% of B, 0.1-0.8% of Mg, 0.021-(0.055-0.01×[Mn%])% of V, 3.0-8.0% of the total of Ti oxide and Ti in terms of TiO<SB POS="POST">2</SB>, 0.1-1.2% of the total of Al oxide and Al in terms of Al<SB POS="POST">2</SB>O<SB POS="POST">3</SB>, 0.1-1.0% of the total of Si oxide and Si in terms of SiO<SB POS="POST">2</SB>, 0.01-0.3% of the total of metal fluoride in terms of F, ≤0.02% of P and ≤0.015% of Nb. <P>COPYRIGHT: (C)2012,JPO&INPIT |
