| 摘要 |
PROBLEM TO BE SOLVED: To provide a flux-cored wire having excellent high-temperature cracking resistance which may cause a problem in an initial layer weld part of a one-side butt joint weld of steel plates comprising mild steel or high-tensile steel, excellent welding work efficiency in the all-position welding, and excellent mechanical characteristic of a weld metal. SOLUTION: The flux-cored wire which is used for the welding of steel plates comprising mild steel or high-tensile steel, comprises filling a steel shell with flux. The flux filling ratio to the total mass of the wire is, by mass, 10-25%. The wire contains, to the total mass of the wire, 0.02-0.10 mass% C, 0.05-1.50 mass% Si, 1.7-4.0 mass% Mn, 0.05-1.00 mass% Ti, 5.0-8.0 mass% TiO<SB>2</SB>, 0.20-1.50 mass% Al, 0.05-1.0 mass% Al<SB>2</SB>O<SB>3</SB>, 0.3-2.0 mass% Mg, 0.005-0.035 mass% N, and the balance Fe with inevitable impurities. COPYRIGHT: (C)2011,JPO&INPIT |
