| 摘要 |
PROBLEM TO BE SOLVED: To provide a cooling method by which appropriate masking pattern can be set by adequately corresponding to the change of a cooling process and cooling equipment of a steel sheet and the size change of the steel sheet. SOLUTION: In a method for cooling the steel sheet after hot-rolling with a cooling system provided with a masking device in the width direction of the steel sheet in the rear of a rolling mill, the temperatures after cooling in the end parts and the middle part in the width direction of the steel sheet when cooling the steel sheet by applying a preset masking pattern in the width direction to the steel sheet are calculated on the basis of the temperatures in the end parts and the middle part in the width direction of the steel sheet before charging to the cooling system and cooling is performed by changing the preset masking pattern in the width direction so that the temperature difference between the end parts and the middle part in the width direction of the steel sheet after cooling is within a prescribed range. COPYRIGHT: (C)2007,JPO&INPIT
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