HOT-ROLLED STEEL SHEET COOLING DEVICE, AND HOT-ROLLED STEEL SHEET COOLING METHOD

Title:

HOT-ROLLED STEEL SHEET COOLING DEVICE, AND HOT-ROLLED STEEL SHEET COOLING METHOD

Document Type and Number:

WIPO Patent Application WO/2020/059577

Kind Code:

A1

Abstract:

This cooling device is provided with, for each of a plurality of divided cooling surfaces, a cooling water nozzle 23 and a switching device for switching between impact and non-impact of cooling water sprayed from the cooling water nozzle 23 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 23 each have a spray axis P 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 23 in the width direction.

Inventors:

NIITANI HIROSHI (JP)
HAYASHI NOBUMASA (JP)
MATSUMOTO RUMI (JP)
SERIZAWA YOSHIHIRO (JP)
HOSHO TOMOFUMI (JP)
USHIZAWA TAKUMU (JP)
KATOU NAOKO (JP)

Application Number:

PCT/JP2019/035581

Publication Date:

March 26, 2020

Filing Date:

September 10, 2019

Export Citation:

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Assignee:

NIPPON STEEL CORP (JP)

International Classes:

B21B45/02

Domestic Patent References:

WO2018073973A1	2018-04-26
WO2010052797A1	2010-05-14
WO2018073973A1	2018-04-26
WO2018179449A1	2018-10-04

Foreign References:

JP2008100256A	2008-05-01
JP2011104594A	2011-06-02
JPH05228525A	1993-09-07
JPH0671328A	1994-03-15
JP2011051002A	2011-03-17
JP3818501B2	2006-09-06

Other References: