Title:
METHOD OF MANUFACTURING HOT ROLLED STEEL
Document Type and Number:
Japanese Patent JP3664067
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a manufacturing method of a hot-rolled steel sheet for suppressing the generation of camber and wedge in a hot rolling process.
SOLUTION: In a rough rolling stage where the rolling of plural passes in a hot rolling process is performed, by rolling pass where a-value (unit: mm4/N2) which is specified by a following equation (1) is not less than 10×10-9 and b-value which is specified by a following equation (2) is less than 40, the camber is straightened with a side guide which is arranged on the outlet side of a rolling mill. The equation (1) and the equation (2) are expressed below. Where, R is the radius of a work roll (mm), Wm is the distance between roll chocks (mm), hin is the thickness on the inlet side of a material to be rolled (mm), hout is the thickness on the outlet side of the material to be rolled, K is the mill constant (N/mm) and Wa is the width of the material to be rolled (mm).
Inventors:
Toshihiko Akazawa
Manabu Eto
Manabu Eto
Application Number:
JP2000311927A
Publication Date:
June 22, 2005
Filing Date:
October 12, 2000
Export Citation:
Assignee:
SUMITOMO METAL INDUSTRIES,LTD.
International Classes:
B21B39/14; B21B37/00; B21B37/30; (IPC1-7): B21B37/30; B21B37/00; B21B39/14
Domestic Patent References:
| JP9239426A | ||||
| JP6339719A | ||||
| JP7096316A |
Attorney, Agent or Firm:
Shoichi Hirose