| 摘要 |
A wire rod with high strength and impact toughness and a manufacturing method thereof are provided. The wire rod with high strength and impact toughness according to the present invention comprises, by weight%: 0.05 to 0.15% of carbon (C); 0.1% or less of silicon (Si); 3.0 to 4.0% of manganese (Mn); 0.1 to 0.6 of molybdenum (Mo); 0.020% or less of phosphorus (P); 0.020% or less of sulfur (S); 0.0010 to 0.0030% of boron (B); 0.010 to 0.030% of titanium (Ti); 0.0050% or less of nitrogen (N); and the remainder including Fe and inevitable impurities, wherein a microstructure thereof includes bainite of 90 area% or more and the remainder of martensite-austenite (MA). |
