| abstract |
The hot-rolled steel sheet according to any one of claims 1 to 3, wherein the hot-rolled steel sheet contains 0.030 to less than 0.075% of C, 0.08 to 0.40% of Si + Al, 0.5 to 2.0% of Mn and 0.020 to 0.150% of Ti, Wherein the ferrite is 90% to 98%, the martensite is 2% to 10%, the bainite is 0% to 3%, the pearlite is 0% to 3% %, And in the above-mentioned martensite, the number ratio of martensite particles having a hardness of 10.0 m or more is 10% or less, and a hardness of 8.0 to 10.0 mils relative to the number N2 of martensite particles having a hardness of less than 8.0 The ratio N1 of the martensite particles having N1 / N2 is 0.8 to 1.2. |