HIGH STRENGTH HOT-ROLLED STEEL SHEET AND METHOD FOR PRODUCING SAME

This high strength hot-rolled steel sheet comprises specific chemical components and has a structure that contains, in area percentage, from 20% to 60% (inclusive) of martensite and 40% or more of ferrite, with the total of the martensite and the ferrite being 90% or more. The martensite has an average particle diameter of from 5.0 [mu]m to 50 [mu]m (inclusive); the ratio of the hardness of the martensite to the hardness of the ferrite is from 0.6 to 1.6 (inclusive); and this high strength hot-rolled steel sheet has a tensile strength of 980 MPa or more. 种高强度热轧钢板，具有规定的化学成分，组织以面积率计含有20％以上、60％以下的马氏体和40％以上的铁素体，所述马氏体和所述铁素体的合计面积率为90％以上，所述马氏体的平均粒径为5.0μm以上、50μm以下，所述马氏体的硬度与所述铁素体的硬度之比为0.6以上、1.6以下，该高强度热轧钢板的抗拉强度为980MPa以上。