METHOD FOR MANUFACTURING HOT-ROLLED STEEL SHEET

摘要

PROBLEM TO BE SOLVED: To provide a method for manufacturing a hot-rolled steel sheet having uniform thickness in the width direction by eliminating waved thickness distribution in the width direction of the hot-rolled steel sheet. SOLUTION: In the manufacturing method of the hot-rolled steel sheet by which rolling is performed after cooling the surface of a rolled stock just before the roll bite in a hot-finishing mill, the cooling is performed so that difference between the highest thermal conductivity and the lowest thermal conductivity in the width direction of the rolled stock is <=200 kcal/m<2> / deg.C/h.