COOLING METHOD OF STEEL PLATE - NIPPON STEEL CORP

Title:

COOLING METHOD OF STEEL PLATE

Document Type and Number:

WIPO Patent Application WO/2008/035510

Kind Code:

A1

Abstract:

A method for cooling the opposite surfaces of a steel plate under clamp conveyance between a clamp roll pair with refrigerant jet flow from the upper/lower surface nozzle groups between the clamp roll pair in which the upper and lower surfaces of a steel plate is cooled uniformly and precisely down to a target temperature while the quality of steel material is stably ensured by ensuring cooling control precision stably from start of cooling to end of cooling in the steel plate cooling region between the clamp roll pair. The steel plate cooling region between each clamp roll pair in which the upper/lower surface nozzle group is arranged is divided into at least a jet flow collision region and a jet flow non-collision region in the steel plate conveyance direction or in the steel plate conveyance direction and the width direction, heat transfer coefficient is predicted previously for each divided region, prediction temperature history of the steel plate is operated based on the prediction value, and then the quantity of refrigerant being jetted to the jet flow collision region of the upper/lower surface nozzle group is set and controlled.

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Inventors:

SERIZAWA YOSHIHIRO (JP)
YAMAMOTO RYUJI (JP)
OGAWA SHIGERU (JP)

Application Number:

PCT/JP2007/065032

Publication Date:

March 27, 2008

Filing Date:

July 25, 2007

Export Citation:

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Assignee:

NIPPON STEEL CORP (JP)
SERIZAWA YOSHIHIRO (JP)
YAMAMOTO RYUJI (JP)
OGAWA SHIGERU (JP)

International Classes:

B21B45/02

Foreign References:

JP2006035311A	2006-02-09
JPS63177948U	1988-11-17
JPS6087914A	1985-05-17
JPH0216372B2	1990-04-17

Other References: