Title:
LOW CARBON THIN-WALLED CAST STEEL PIECE AND LOW CARBON STEEL SHEET OBTAINED BY TWIN DRUM TYPE CONTINUOUS CASTING PROCESS, AND METHOD FOR MANUFACTURING THE SAME
Document Type and Number:
Japanese Patent JP2004195522
Kind Code:
A
Abstract:
To provide a low carbon steel sheet and a low carbon cast steel piece which can securely be made free from surface defects by preventing inclusions from adhering to an immersion nozzle and from flocculating and coalescing in molten steel so that the inclusions are scattered fine in the steel sheet, and a method for manufacturing the same.
After the molten steel is decarburized to a low carbon concentration region, Ti and at least Ce and La are added to the molten steel. Then the molten steel is cast by the twin drum type continuous casting process.
Inventors:
SASAI KATSUHIRO
OHASHI WATARU
OHASHI WATARU
Application Number:
JP2002368739A
Publication Date:
July 15, 2004
Filing Date:
December 19, 2002
Export Citation:
Assignee:
NIPPON STEEL CORP
International Classes:
B22D11/06; B22D11/00; B22D11/108; C21C7/00; C21C7/04; C21C7/06; C21C7/068; C22C38/00; (IPC1-7): B22D11/06; B22D11/00; B22D11/108; C21C7/00; C21C7/04; C21C7/06; C21C7/068; C22C38/00
Domestic Patent References:
| JPH0317233A | 1991-01-25 | |||
| JPS63290222A | 1988-11-28 | |||
| JPH03287711A | 1991-12-18 | |||
| JPH03104844A | 1991-05-01 | |||
| JPH03291136A | 1991-12-20 | |||
| JP2002121641A | 2002-04-26 | |||
| JPS5270918A | 1977-06-13 | |||
| JP2002088412A | 2002-03-27 |
Foreign References:
| WO2003002771A1 | 2003-01-09 |
Attorney, Agent or Firm:
Takashi Ishida
Jun Tsuruta
Hiroshi Kamematsu
Masaya Nishiyama
Jun Tsuruta
Hiroshi Kamematsu
Masaya Nishiyama