| 摘要 |
Disclosed are a high strength hot-rolled steel sheet with excellent impact resistance and formability on an edge part, and a manufacturing method thereof. According to an aspect of the present invention, the high strength hot-rolled steel sheet with excellent impact resistance and formability on an edge part comprises: 0.03-0.1 wt% of C; 0.01-1.2 wt% of Si; 1.2-1.9 wt% of Mn; 0.01-0.08 wt% of Al; 0.005-0.8 wt% of Cr; 0.01-0.12 wt% of Mo; 0.001-0.05 wt% of P; 0.001-0.005 wt% of S; 0.001-0.01 wt% of N; 0.001-0.15 wt% of at least one selected from groups formed of Ti, Nb, and V; and the remainder consisting of Fe and inevitable impurities. Each or carbonitrides of Ti, Nb, and V with 100 nm or greater of a diameter of 3x108 unit/cm^2 or less. The product of a tensile strength (TS) and a shared-edge bending ratio (SBR) is 40,000 MPa·% or greater. |
