Specialized metallurgical processes – compositions for use therei – Processes – Producing or treating free metal
Reexamination Certificate
2008-02-15
2011-11-01
Wyszomierski, George (Department: 1733)
Specialized metallurgical processes, compositions for use therei
Processes
Producing or treating free metal
C148S540000, C148S541000, C164S468000, C164S499000
Reexamination Certificate
active
08048197
ABSTRACT:
The present invention provides a low carbon steel sheet and a low carbon steel slab on which formation of surface defects can be surely prevented by preventing aggregation of inclusions in the molten steel and finely dispersing inclusions in the steel sheet or slab, and a process for producing the steel sheet and slab. The present invention provides a process comprising the steps of decarburizing a molten steel so as to produce a carbon concentration of up to 0.01% by mass, pre-deoxidizing the molten steel by adding Al thereto so as to produce a dissolved oxygen concentration from 0.01 to 0.04% by mass, adding thereto Ti and at least La and/or Ce, and casting the molten steel, and a steel sheet and a steel slab obtained by the process.
REFERENCES:
patent: 3960616 (1976-06-01), Evans et al.
patent: 4289533 (1981-09-01), Gunji et al.
patent: 4609412 (1986-09-01), Kamio et al.
patent: 6117389 (2000-09-01), Nabeshima et al.
patent: 6344093 (2002-02-01), Ohmori et al.
patent: 6406565 (2002-06-01), Hashimura et al.
patent: 6461402 (2002-10-01), Morita et al.
patent: 7226493 (2007-06-01), Grong et al.
patent: 7448431 (2008-11-01), Miki et al.
patent: 1218839 (1999-06-01), None
patent: 0 829 546 (1998-03-01), None
patent: 1 453 717 (1976-10-01), None
patent: 362244561 (1987-10-01), None
patent: A-63-149057 (1988-06-01), None
patent: 63-176417 (1988-07-01), None
patent: 1-172508 (1989-07-01), None
patent: 3-104844 (1991-05-01), None
patent: 3-287711 (1991-12-01), None
patent: 4-309444 (1992-11-01), None
patent: 4-314844 (1992-11-01), None
patent: A-5-104219 (1993-04-01), None
patent: A-5-302112 (1993-11-01), None
patent: 8-218112 (1996-08-01), None
patent: 10-258343 (1998-09-01), None
patent: 11-100611 (1999-04-01), None
patent: 11-323426 (1999-11-01), None
patent: 11-343516 (1999-12-01), None
patent: 2000-96182 (2000-04-01), None
patent: 2001-49326 (2001-02-01), None
patent: WO 00/33992 (2000-06-01), None
The Iron and Steel Institute of Japan, “Waga Kuni ni okeru Hagane no Renzoku Chuzo Gijutsushi”, Nov. 30, 1996, pp. 286-287.
Acta Metallurgica Sinica, Jun. 1978, vol. 14, No. 2, pp. 196-197.
Kimura Yoshiaki
Matsumiya Tooru
Nakashima Junji
O-hashi Wataru
Sasai Katsuhiro
Kenyon & Kenyon LLP
Nippon Steel Corporation
Wyszomierski George
LandOfFree
Low carbon steel sheet and low carbon steel slab and process... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Low carbon steel sheet and low carbon steel slab and process..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low carbon steel sheet and low carbon steel slab and process... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4271323