| 摘要 |
The present invention relates to a high toughness wire rod and a manufacturing method thereof and, more specifically, relates to a high toughness wire rod, comprising: 0.05-0.15 wt% of carbon (C), 0.001-0.5 wt% of silicon (Si), 1.0-2.0 wt% of manganese (Mn), 0.004-0.01 wt% of sulfur (S), 0.003-0.008 wt% of nitrogen (N), 0.005-0.03 wt% of titanium (Ti), 0.02 wt% or less of phosphorus, less than 0.01 wt% of aluminum (Al), and the remainder consisting of iron (Fe) and other impurities and filled with 50% or greater of an acicular ferrite phase with respect to the entire phase ratio; and a manufacturing method thereof. The present invention can manufacture a non-normalized steel wire rod having an acicular ferrite structure, and the non-normalized steel wire rod obtained by the present invention can obtain similar impact toughness to bainite-based non-normalized steel by being filled with 50% or greater of the acicular ferrite phase with respect to the entire issue. |
