| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for rolling the width of a steel slab, which method can economically produce the steel slab having a target width in excellent productivity by suppressing and preventing the generation of the defects due to the falling down of the corner portions of the steel slab. SOLUTION: In the method for the rolling the width of the steel slab 10, the steel slab 10 at a high temperature state is rolled int the width direction by a width reduction rolling apparatus, and then is rolled in the thickness direction. When the width of the steel slab 10 is reduced by the width reduction rolling apparatus, the corner portions 11 to 14 of the steel slab 10 on both sides in the width direction are forcedly cooled over the whole range in the longitudinal direction so that the temperature of the corner portions 11 to 14 becomes lower than the temperature ofα-γtwo phase region. COPYRIGHT: (C)2009,JPO&INPIT
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