| 摘要 |
PROBLEM TO BE SOLVED: To provide a solid wire for carbon dioxide shielded arc welding, the solid wire that enables sufficient penetration to be obtained even in a narrow groove execution and that enables weld metal to be obtained which is superior in mechanical performance such as strength and toughness. SOLUTION: The solid wire contains, by mass%, 0.03-0.10% C, 0.67-1.00% Si, 1.81-2.50% Mn, 0.006-0.018% S, 0.100-0.150% Ti, 0.0015-0.0070% B, and≤0.10-0.45% Cu having solder content, with parameters P<SB>BS</SB>and P<SB>MT</SB>satisfying P<SB>BS</SB>≤10 and P<SB>MT</SB>≤32, controlling≤0.020% P,≤0.04% Nb,≤0.04% V,≤0.04% Al, with the balance being Fe and inevitable impurities, wherein P<SB>BS</SB>=[B]×[S]×10<SP>5</SP>and P<SB>MT</SB>=[Mn]×[Ti]×10<SP>2</SP>. COPYRIGHT: (C)2009,JPO&INPIT
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