METHOD OF MANUFACTURING FOR STEEL SHEET

PROBLEM TO BE SOLVED: To provide a method for preventing the generation of defective thickness and insufficient flatness by preventing peak load at the tailing-off of a material in the finish rolling of a hot-rolled steel sheet and thick steel plate. SOLUTION: In the rolling of the hot-rolled steel...

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Bibliographic Details
Main Authors SASAKI TAMOTSU, YAZAWA TAKEO
Format Patent
LanguageEnglish
Published 29.01.2002
Edition7
Subjects
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Summary:PROBLEM TO BE SOLVED: To provide a method for preventing the generation of defective thickness and insufficient flatness by preventing peak load at the tailing-off of a material in the finish rolling of a hot-rolled steel sheet and thick steel plate. SOLUTION: In the rolling of the hot-rolled steel sheet, the difference ΔP between the rolling load in the stational part of a material to be rolled and the peak load in the rear end part is preliminarily determined about the pass at each stand of a finishing mill 4, temperature rising for canceling ΔPmax from the maximum value of ΔP (=ΔPmax) of the rolling-load difference of each stand and, after heating the rear end part of the material to be rolled based on this temperature rising, finish rolling is performed. In the rolling of the thick steel plate, the ΔP is preliminarily determined about each pass of the finish rolling with a single stand and the temperature rising is decided from the maximum value ΔPmax of the ΔP of each pass.
Bibliography:Application Number: JP20000185636