| abstract |
A high-strength hot-rolled steel sheet excellent in ultimate deformability and shape freezing property and a method for producing the same are provided. An average value of X-ray random intensity ratios of {100} <011> to {223} <110> orientation groups is 2 at a thickness of at least 1/2 with ferrite or bainite as the phase with the largest volume fraction. 0.5 or more, the average value of the X-ray random intensity ratio of the three crystal orientations of {554} <225>, {111} <112> and {111} <110> is 3.5 or less, {100} <011> The X-ray reflection random intensity ratio satisfies all of {211} <011> X-ray random intensity ratio and {100} <011> X-ray reflection random intensity ratio of 2.5 or more, and the r value in the rolling direction. And at least one of the r values in the direction perpendicular to the rolling direction is 0.7 or less, and further, the anisotropy ΔeEl of uniform elongation is 4% or less, the anisotropy ΔLE1 of local elongation is 2% or more, And △ uEl is less than △ LE1 High strength hot rolled steel sheet excellent in extreme deformability and shape fixability is. [Selection figure] None |