Title:
CONTINUOUS CASTING METHOD FOR MOLTEN STEEL
Document Type and Number:
Japanese Patent JP2017196625
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a continuous casting method capable of stably making coarse granular crystals near the center of a casting piece (including casting pieces having a C content of 0.1 or below mass%) for high strength steel and coarse columnar crystals surrounding them into fine equiaxed crystals.SOLUTION: With use of a continuous casting apparatus having an inductive electromagnetic stirring device 7 between a meniscus 12 in a mold and 10 m below the mold, molten steel comprising 0.03 or below mass% acid soluble Al, 0.014 to 0.1 mass% acid soluble Ti, and 0.0003 to 0.02 mass%, in total, of at least one or more of Ce, La, Nd and Pr, is poured into the mold 6 while inert gas containing 2% or above Ngas or Nis blown from a gas blowing type immersion nozzle 3. One or both of Bi and Sn are added to the molten steel 11 in the mold to become 0.0005 to 0.01 mass% in total, and the molten steel is cast while being revolved in a horizontal plane by the inductive electromagnetic stirring device 7.SELECTED DRAWING: Figure 1
Inventors:
SASAI KATSUHIRO
HARADA HIROSHI
MOROHOSHI TAKASHI
HARADA HIROSHI
MOROHOSHI TAKASHI
Application Number:
JP2016086991A
Publication Date:
November 02, 2017
Filing Date:
April 25, 2016
Export Citation:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORP
International Classes:
B22D11/11; B22D11/00; B22D11/04; B22D11/10; B22D11/108; B22D11/115; C22C38/00; C22C38/60
Domestic Patent References:
| JP2003129183A | 2003-05-08 | |||
| JP2005177848A | 2005-07-07 | |||
| JP2008290103A | 2008-12-04 | |||
| JP2001105104A | 2001-04-17 | |||
| JP2000061598A | 2000-02-29 |
Attorney, Agent or Firm:
Intellectual Property Office
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