| 摘要 |
PROBLEM TO BE SOLVED: To obtain a steel material having high uniformity by reducing temperature variation effect caused by scale spots when a high temperature thick steel plate is carried in a state of being restrained with restraining rolls, and is cooled using spray nozzles from the upper and lower parts. SOLUTION: The cooling equipment line and a cooling method for a thick steel plate are applied when a thick steel plate is cooled after being subjected to finish rolling. The cooling equipment line comprises: a hot straightening machine, a thermometer, a plasma irradiation apparatus; and a cooling apparatus where, while the thick steel plate in a high temperature state is bitten with two or more pairs of restraining rolls each making a pair by the rolls arranged up and down, and is carried, water is injected to the upper and lower faces of the thick steel plate between the restraining rolls. COPYRIGHT: (C)2008,JPO&INPIT
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