ARRANGEMENT OF HOT-ROLLING EQUIPMENT AND HOT-ROLLING METHOD

Japanese Patent JP3793512

B2

PROBLEM TO BE SOLVED: To provide the arrangement of hot-rolling equipment and a hot-rolling method by which only the defective part in shape is removable as a crop piece by sufficiently raising temperature in dropped temperature part in the front and rear end parts of a rough bar without requiring to stop the rough bar at heating and without requiring huge equipment investment.
SOLUTION: In this arrangement of the hot-rolling equipment, a transverse induction heating device 4 for performing induction heating of the whole in the width direction of the rough bar and a cutting machine 8 with which the crop pieces in the front and the rear end parts in the longitudinal direction of the rough bar are cut are arranged between a roughing mill 2 and a finishing mill 3. In this hot-rolling method, by using the hot-rolling equipment having the arrangement of the hot-rolling equipment, the temperature in the dropped temperature part in one or both the front and rear end parts of the rough bar 1 is raised by heating by heating the parts where are at least ≤ 1 m from the end parts in one or both in the front and rear end parts of the rough bar 1 with the transverse induction heating device 4 and, in this way, the cutting amount of the crop of the rough bar is reduced.

Takehiro Nakamoto
Hiroki Sakagami
Hiroshi Kimura
Hiroshi Noguchi
Takaya Takaya
Tomoaki Yoshiyama
Kisho Tanaka

JP2003034808A

July 05, 2006

February 13, 2003

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Nippon Steel Corporation

B21B1/26; H05B6/10; B21B15/00; B21B45/00; (IPC1-7): B21B1/26; B21B15/00; B21B45/00; H05B6/10

JP2006002A
JP10291016A
JP10094818A

Shunta Naito
Hisataka Tanaka

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