| 摘要 |
PROBLEM TO BE SOLVED: To provide a high strength hot rolled steel sheet fully utilizing grain dispersion strengthening by Ti and a manufacturing method therefor.SOLUTION: There is provided a high strength hot rolled steel sheet having a steel sheet structure with a steel sheet composition containing, by mass%, Ti:over 0.20%, an area ratio of a ferrite phase of 80% or more, an average crystal grain size of the ferrite phase of 6 μm or less, a deposition amount of carbide containing Ti of 0.22% or more by mass%, the average particle diameter of 10 nm or less, and tensile strength of 980 MPa or more. |
