| 摘要 |
PROBLEM TO BE SOLVED: To provide a solid wire for gas shielded arc welding which targets at 590 MPa class high tensile strength steel and provides the strength and toughness of weld metal even used for multi-layer build up welding under the welding procedure conditions of a quantity of weld heat input of 30 to 40 kJ/cm and an interpass temperature of 250 to 350°C, and to provide a welding method using the same. SOLUTION: The solid wire for gas shielded arc welding comprises, by mass, 0.05 to 0.15% C, 0.7 to 1.1% Si, 2.0 to 2.6% Mn, 0.15 to 0.55% Mo, 0.15 to 0.30% Ti, 0.02 to 0.50% Ni, 0.005 to 0.012% B,≤0.020% Al, 0.002 to 0.015% O,≤0.010% N and 0.005 to 0.05% of one or more kinds of metals selected from V and Nb, and the balance Fe with inevitable impurities. COPYRIGHT: (C)2004,JPO&NCIPI
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