| 摘要 |
PROBLEM TO BE SOLVED: To provide a flux-cored wire which is excellent in high-temperature cracking resistance, welding workability and mechanical properties of a weld metal. SOLUTION: In the flux-cored wire, flux is filled in a steel-made shell, the flux filling ratio to the total mass of wire is 10-25 mass%. The flux contains, by mass, C:0.03-0.08%, Si:0.10-1.00%, Mn:2.4-3.7%, Ti:0.15-1.00%, TiO<SB>2</SB>:5.0-8.0%, Al:0.20-0.50%, Al<SB>2</SB>O<SB>3</SB>:0.05-0.50%, B:0.003-0.020%, Mg:0.3-1.0% and the balance Fe with inevitable impurities. Further, an inequality (4×Ti+10×Al-3×Si)≥1.0 is satisfied, where (Ti) denotes the amount of Ti to be calculated only from Ti out of Ti and TiO<SB>2</SB>contained in the wire. COPYRIGHT: (C)2011,JPO&INPIT |
