| 摘要 |
This hot-rolled steel sheet, which has a prescribed chemical composition, has a structure that includes, by area ratio, a total of 80-98% ferrite and bainite, and 2-10% martensite, wherein, when a boundary having an orientation difference of 15 ° or more is defined as a grain boundary and a region being surrounded by the grain boundary and having an equivalent circle diameter of 0.3 μm or more is defined as a crystal grain, the proportion in said structure of crystal grains having an orientation difference of 5-14° within the grain is 10-60% by area ratio. |
