| 摘要 |
PROBLEM TO BE SOLVED: To provide a flux-cored wire for gas shielded arc welding and a welding method that improve fatigue strength by using a flux-cored wire which excels in wire drawing, high oxygen, high nitrogen, and low slag without using expensive elements and thereby lowering the Ms point of a weld metal at low cost, and that materialize superior highspeed weldability, low spatter, low slag, and arc stability. SOLUTION: The flux cored wire contains, by mass, 0.16-1.50% C, 0.30-1.50% Si, 0.50-5.00% Mn,≥0.020% O, 0.0020-0.0400% N,≤0.030% P,≤0.030% S,≤0.15% Ti,≤0.20% Al,≤0.100% F and Ca each,≤0.200% total of K, Na and Li,≤1.00% Mg,≤0.50% REM (rare metal element), <2.00% each of Ni, Cr, Nb, V, Mo and Cu,≤0.0100% B, with the balance consisting of Fe and inevitable impurities and with a flux ratio of 7-30%. COPYRIGHT: (C)2008,JPO&INPIT |
