| 摘要 |
PROBLEM TO BE SOLVED: To provide a flux-cored wire for submerged arc welding of low-temperature steel, and a welding method using the same in which the welding workability is excellent even under a high-speed welding condition, and a weld metal of excellent mechanical performance can be obtained. SOLUTION: The flux-cored wire for submerged arc welding of low-temperature steel contains, by the wire total mass% of the flux-cored wire, 0.02-0.30% C, 0.08-0.6% Si, 1.2-3.4% Mn, 0.5-3.5% Ni, and 0.03-0.8% Mo in the total of one or both of a steel shell and filling flux; 0.01-0.27% C, 2-15% CaF<SB>2</SB>, and 0.05-0.7% CO<SB>2</SB>part of metal carbonate and the balance Fe in the steel shell, Fe in alloy powder, iron powder and inevitable impurities in the filled flux; the total hydrogen amount of the wire is≤50 ppm, the flux filling ratio of the filled flux in the components is 10-30%, and any joint is not formed in the steel shell. COPYRIGHT: (C)2010,JPO&INPIT |
