Nippon Steel Corporation

Naoko Katou

Yoshihiro Serizawa

Hiroshi Niitani

Rumi Matsumoto

Nobumasa Hayashi

Takumu Ushizawa

The present cooling device includes: when cooling regions obtained by dividing an entire cooling region into a plurality of portions in a steel sheet conveyance direction and three or more portions in a width direction are set as divided cooling surfaces, a cooling water nozzleand a switching device that switches between collision and non-collision of cooling water jetted from the cooling water nozzlewith the divided cooling surface, the cooling water nozzleand the switching device provided for each of the divided cooling surfaces; and a control device that controls operation of the switching device based on a width-direction temperature distribution. The cooling water nozzlehas a jet axis P inclined with respect to a vertical line to the entire cooling region when viewed in the steel sheet conveyance direction, and the cooling water goes to the side opposite to the cooling water nozzlein the width direction after colliding with the divided cooling surface.

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Tokyo, Japan

Naoko Katou