Hot-rolled steel sheet cooling device, and hot-rolled steel sheet cooling method

This cooling device is provided with, for each of a plurality of divided cooling surfaces, a cooling water nozzle and a switching device for switching between impact and non-impact of cooling water sprayed from the cooling water nozzle onto the divided cooling surface, where the divided cooling surf...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	MATSUMOTO, RUMI, USHIZAWA, TAKUMU, HAYASHI, NOBUMASA, NIITANI, HIROSHI, HOSHO, TOMOFUMI, SERIZAWA, YOSHIHIRO, KATOU, NAOKO
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	CHEMISTRY GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS PERFORMING OPERATIONS PUNCHING METAL ROLLING OF METAL TRANSPORTING
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Beschreibung
Zusammenfassung:	This cooling device is provided with, for each of a plurality of divided cooling surfaces, a cooling water nozzle and a switching device for switching between impact and non-impact of cooling water sprayed from the cooling water nozzle onto the divided cooling surface, where the divided cooling surfaces are cooling regions obtained by dividing an entire cooling region into a plurality of regions in the steel sheet conveying direction and into at least three regions in the width direction. The cooling device is further provided with a control device for controlling the operation of the switching devices on the basis of a width-direction temperature distribution. The cooling water nozzles each have a spray axis that is inclined with respect to a line perpendicular to the entire cooling region as seen from the steel sheet conveying direction, and after impacting the divided cooling surface, the cooling water is directed to the opposite side from the corresponding cooling water nozzle in the width direction.