| 摘要 |
PROBLEM TO BE SOLVED: To provide a high-strength steel sheet that is hard to generate edge scabs and is excellent in surface quality, and to provide a manufacturing method thereof.SOLUTION: A high-strength steel sheet contains, by mass%, C of 0.07-0.14%, Si of 0.01-0.9%, Mn of 1.0-2.5%, P of 0.05% or less, S of 0.01% or less, sol. Al of 0.01-0.06%, and Cr of 0.7% or less, and it also contains either or both of Nb of 0.01-0.1% and V of 0.02-0.2%, satisfying formula 2×[Nb]+[V]≥0.05 (where [Nb] and [V] represent mass% of Nb and V respectively). Furthermore, the high-strength steel sheet contains Ti of 0.010-0.020% and N of 0.003% or less, and the remainder is formed of Fe and inevitable impurities. |
