Title:
COOLING DEVICE, COOLING METHOD, MANUFACTURING DEVICE, AND MANUFACTURING METHOD FOR HOT-ROLLED STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2011/001934
Kind Code:
A1
Abstract:
Provided are a cooling device, a cooling method, a manufacturing device, and a manufacturing method for a hot-rolled steel sheet, which are capable of manufacturing a hot-rolled steel sheet having ultra-fine crystal grains.
The cooling device for a hot-rolled steel sheet is configured so that when the steel sheet conveyance direction length of the interval from the press-down point in the final stand to the exit side of a housing post is denoted by L1, the steel sheet conveyance direction length of a portion in the interval, where high-pressure jet water is continuously ejected toward a steel sheet, is denoted by L2, and the ratio L2/L1 is denoted by X, a steel sheet conveyance direction average value (Ps [kPa]) of the steel sheet surface collision pressure of the high-pressure jet water in the portion having the length L2 satisfies the relationship Ps > 2.5X(-1/0.6) at the upper and lower surfaces of the steel sheet. The cooling method uses the cooling device. The manufacturing device for a hot-rolled steel sheet includes the final stand in a hot finish rolling machine line and the cooling device in this order in the steel sheet conveyance direction. The manufacturing method for a hot-rolled steel sheet includes a step of processing, using the manufacturing device, a steel sheet rolled at the final stand in the hot finish rolling machine line.
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Inventors:
ETO MANABU (JP)
HARAGUCHI YOICHI (JP)
HARAGUCHI YOICHI (JP)
Application Number:
PCT/JP2010/060970
Publication Date:
January 06, 2011
Filing Date:
June 28, 2010
Export Citation:
Assignee:
SUMITOMO METAL IND (JP)
ETO MANABU (JP)
HARAGUCHI YOICHI (JP)
ETO MANABU (JP)
HARAGUCHI YOICHI (JP)
International Classes:
B21B45/02
Foreign References:
| JP2005213595A | 2005-08-11 | |||
| JP2005213595A | 2005-08-11 | |||
| JPH0429865B2 | 1992-05-20 | |||
| JP2007061838A | 2007-03-15 |
Other References:
See also references of EP 2450117A4
Attorney, Agent or Firm:
HOSHINO, Tetsuro et al. (JP)
Tetsuro Hoshino (JP)
Tetsuro Hoshino (JP)
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