Hot Rolled Steel Sheet

Abstract: Provided is a hot-rolled steel sheet which has a prescribed chemical composition, and in which the steel structure has, in terms of area, a total of 2-30% of martensite and residual austenite and a total of 0-3% of pearlite and cementite, with the remainder being composed of ferrite and bainite, the area of crystal grains having a grain diameter of greater than 12 µm accounts for 50% or less of the observed area, in an aggregate structure measured at a sheet thickness central portion, the maximum polarization density of the {100}<011>, {211}<011>, {311}<011>, {110}<011>, and {332}<113> orientation groups is 8.0 or less, and when the field of observation of the steel structure is segmented at intervals of 2 µm in the sheet thickness direction and the total of martensite and residual austenite is measured for each segmented region, the maximum value among the totals is no more than 3.0 times the average value of the totals.

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