Title:
CONTINUOUS CASTING METHOD FOR STEEL
Document Type and Number:
Japanese Patent JP2015205333
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a continuous casting method which can prevent occurrence of traversal cracks of a cast piece in a continuous casting machine, and increase casting speed.SOLUTION: A continuous casting method applies pressure to a cast piece 1 extracted from a mold 2, when thickness of the cast piece 1 at a bottom edge of the mold 2 in the continuous casting machine is D(mm) and thickness of the cast piece 1 at a position 3 m below hot metal surface along the extraction direction of the cast piece 1 is D(mm), so as to satisfy 100×(D-D)/D≥5%. A secondary cooling water is sprayed to the cast piece 1 between the bottom edge of the mold 2 and a bottom edge of a vertical part to keep surface temperature of the cast piece 1 at 100+(Ar1 transformation point/2)+(Ar3 transformation point/2)(°C) or less for 40 seconds or more, and then the cast piece 1 is heated again to 100+Ac3 transformation point(°C) or more.
Inventors:
ITO YOICHI
AWAJIYA HIROSHI
TAMIYA KENICHIRO
MIKI YUJI
AWAJIYA HIROSHI
TAMIYA KENICHIRO
MIKI YUJI
Application Number:
JP2014088756A
Publication Date:
November 19, 2015
Filing Date:
April 23, 2014
Export Citation:
Assignee:
JFE STEEL CORP
International Classes:
B22D11/20; B22D11/041; B22D11/124; B22D11/128; B22D11/22
Domestic Patent References:
| JP3239808B2 | 2001-12-17 | |||
| JP2008307600A | 2008-12-25 | |||
| JP2010137256A | 2010-06-24 | |||
| JPH0569099A | 1993-03-23 | |||
| JPS62224462A | 1987-10-02 |
Attorney, Agent or Firm:
Kenichiro Ochiai
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