Document Type and Number:
Japanese Patent JP4714658
Kind Code:
B2
Abstract:
To simultaneously control the temperature distributions in the width direction of steel and the moving direction when heating the steel before the finish rolling in the hot rolling process.
The steel H is heated with heaters 31, 32, 33 in this order while moving the steel. The interval XRbetween the cores 41, 42 of the heater 31 and the middle part PCof the steel H and the interval XLbetween the cores 41, 42 of the heater 33 and the middle part PCare respectively made variable. In such constitution, the target value of the output of each heater 31, 32, 33 and the target value of each interval XR, XLare determined on the basis of the target value of temperature rise ΔTCwhich is given to the middle part PC, the target value of the difference ΔERof the temperature rise between the temperature rise which is given to the side parts PRand the temperature rise ΔTCand the target value of the difference ΔELof the temperature rise between the temperature rise which is given to the side part PLand the temperature rise ΔTC. Further, the output of each heater 31, 32, 33 is made equal to each other when the cores 41, 42 of each heater 31, 32, 33 are opposed in the prescribed position of the steel H.
COPYRIGHT: (C)2008,JPO&INPIT
Application Number:
JP2006278000A
Publication Date:
June 29, 2011
Filing Date:
October 11, 2006
Assignee:
Nippon Steel Corporation
International Classes:
B21B45/00; C21D1/42; C21D9/00; C21D11/00; H05B6/10
Domestic Patent References:
Attorney, Agent or Firm:
Koji Hagiwara
Tetsuo Kanamoto
Miaki Kametani
