Flux-cored wire for submerged arc welding of high-strength steel for.

摘要

PROBLEM TO BE SOLVED: To provide a flux-cored wire for submerged arc welding for high-strength steel with which weld metal having excellent mechanical performance and an excellent bead shape and excellent weldability are obtained even under high-speed welding conditions.;SOLUTION: In the flux-cored wire for submerged arc welding for high-strength steel in which the flux is filled inside the outer skin made of steel, the total sum of the outer skin made of steel and flux component contains, by the total mass of the wire, 0.06-0.30% C; 0.06-0.5% Si; 1.0-3.0% Mn; 2.0-9.0% Ni; 1.5-3.5% Cr; 1.0-4.0% Mo; 0.02-0.10% Ti and the balance Fe with inevitable impurities, the C of the flux filled in the wire is 0.02-0.26% by the total mass of the wire, the total quantity of hydrogen of the wire is ≤50 ppm and the flux filling rate is 10-30 mass%.;COPYRIGHT: (C)2009,JPO&INPIT