Title:
DEVICE AND METHOD FOR CONTROLLABLY COOLING THICK STEEL PLATE
Document Type and Number:
WIPO Patent Application WO/2004/110661
Kind Code:
A1
Abstract:
A device for controllably cooling a thick steel plate capable of suppressing the occurrence of a difference in the hardness of the thick steel plate between the surface and the center thereof without lowering rolling efficiency and efficiently mass-producing the thick steel plate with low yield ratio, wherein a gentle cooling zone in which steel structure is partially transformed into ferrite is disposed on the outlet side of a rolling machine and a rapid cooling zone in which the remaining austenite is transformed into perlite, bainite, and martensite is disposed on the rear side of the gentle cooling zone. Namely, the gentle cooling zone and the rapid cooling zone controllable independently of each other are disposed in that order.
Inventors:
UEOKA SATOSHI (JP)
IHARA KENJI (JP)
NISHIZAKI HIROSHI (JP)
NISHIDA SYUNICHI (JP)
YUGE YOSHINORI (JP)
IHARA KENJI (JP)
NISHIZAKI HIROSHI (JP)
NISHIDA SYUNICHI (JP)
YUGE YOSHINORI (JP)
Application Number:
PCT/JP2004/008287
Publication Date:
December 23, 2004
Filing Date:
June 08, 2004
Export Citation:
Assignee:
JFE STEEL CORP (JP)
UEOKA SATOSHI (JP)
IHARA KENJI (JP)
NISHIZAKI HIROSHI (JP)
NISHIDA SYUNICHI (JP)
YUGE YOSHINORI (JP)
UEOKA SATOSHI (JP)
IHARA KENJI (JP)
NISHIZAKI HIROSHI (JP)
NISHIDA SYUNICHI (JP)
YUGE YOSHINORI (JP)
International Classes:
B21B37/76; C21D1/34; C21D11/00; B21B45/02; C21D9/46; (IPC1-7): B21B45/02
Foreign References:
| JP2001164323A | 2001-06-19 | |||
| JPS6244529A | 1987-02-26 | |||
| JP2000084612A | 2000-03-28 |
Attorney, Agent or Firm:
Ochiai, Kenichiro c/o Intellectual, Property Dept (JFE STEEL CORPORATION 2-3, Uchisaiwaicho 2-chom, Chiyoda-ku Tokyo 11, JP)
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