| 摘要 |
<p>Disclosed are high carbon steel capable of increasing the yield of a final product by preventing an edge part from being broken, and preventing deformation by controlling a process condition and adjusting an alloy composition; and a method to manufacture the same. According to the present invention, the method to manufacture high carbon steel comprises: (a) step of reheating a steel slab comprising 0.82-0.88 wt% of carbon (C), 0.5 wt% or less of silicon (Si), 0.7-0.9 wt% of manganese (Mn), 0.35 wt% or less of phosphorus (P), 0.03 wt% or less of sulfur (S), 0.15 wt% or less of titanium (Ti), 0.01-0.05 wt% of niobium (Nb), 0.01-0.05 wt% of vanadium (V), and the remainder consisting of iron (Fe) and inevitable impurities at a slab reheating temperature (SRT) of 1100-1200°C; (b) step of finishing hot rolling the reheated steel at a finishing delivery temperature (FDT) of 750-800°C; and (c) step of cooling the finished hot rolled steel to a coiling temperature (CT) of 600-650°C, and winding the same.</p> |
