| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for suppressing a local strain produced on a steel sheet surface in a water-cooling facility or a washing facility even in the thick steel sheet when the steel sheet is water-cooled or washed at the outlet side of a continuous annealing furnace, and to provide the water-cooling facility or the washing facility suitable for performing the above method. SOLUTION: In the cooling method for cold-rolled steel sheet, when the water-cooling or the washing to the steel sheet is performed at the outlet side of the continuous annealing furnace, the steel sheet is cooled so that the temperature of the steel sheet becomes≤40°C within 1 sec after starting the water-cooling or the washing. Further, in the water-cooling facility or the washing facility for steel sheet at the outlet side of the continuous annealing furnace, a cooling means for steel sheet at the starting of the water-cooling or the washing, is constituted of a liquid injecting device for injecting the cooling water or the washing liquid on the steel sheet surface. COPYRIGHT: (C)2005,JPO&NCIPI
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