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Title:
WIDTH CONTROL METHOD FOR HOT ROLLING
Document Type and Number:
Japanese Patent JP2016215247
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a width control method for hot rolling that can stably achieve width reduction by preventing a slab (a material to be rolled) from curving even when a width reduction quantity of the slab is large in a hot rolling line for a steel plate.SOLUTION: The present invention relates to a width control method for hot rolling characterized in that: when a width of a material to be rolled is put in a target range after rolling by a rough rolling machine by performing width reduction of a slab using a width press device and a vertical rolling machine in combination in a hot rolling line where a continuous heating furnace, the width press device, and the rough rolling machine having the vertical roling machine are arranged, a temperature deviation in a width direction of the slab right before the slab is extracted from the continuous heating furnace is found; when the temperature deviation in the width direction of the slab is larger than a predetermined threshold, a pressure reduction quantity of the slab by the width press device is made less than a predetermined reference value or a lower-limit value of a reference range; and a width reduction quantity by the vertical rolling machine is increased to put a width of the rolled material having been roughly rolled within the target range.SELECTED DRAWING: Figure 1

Inventors:
NAKAZAWA MASATO
MUTO SEIGO
Application Number:
JP2015104084A
Publication Date:
December 22, 2016
Filing Date:
May 22, 2015
Export Citation:
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Assignee:
JFE STEEL CORP
International Classes:
B21B1/02; B21B37/22
Domestic Patent References:
JPH03238101A1991-10-23
JPS63188402A1988-08-04
JP2002263702A2002-09-17
Attorney, Agent or Firm:
Shigeru Inoue
Kazuhiro Mori