Method of manufacture of ultra-low carbon steel

Details Method of manufacture of ultra-low carbon steel Method of manufacture of ultra-low carbon steel

2007-07-24

2007-07-24

King, Roy (Department: 1742)

Metal treatment

Process of modifying or maintaining internal physical...

With casting or solidifying from melt

Reexamination Certificate

active

10758134

ABSTRACT:
A steel sheet with a thickness of at least 0.30 mm is made of an ultra-low carbon steel with a chemical composition including C: at most 0.010%, Si: at most 0.5%, Mn: at most 1.5%, P: at most 0.12%, S: at most 0.030%, Ti: at most 0.10%, Al: at most 0.08%, and N: at most 0.0080%. The total number of non-metallic inclusions observed under a microscope in sixty fields in a sample prepared in accordance with JIS G0555 is at most 20. During manufacture of the steel, the amount of FeO+MnO in slag in a ladle at the time of continuous casting is controlled to at most 15%, and the throughput at the time of casting is made at most 5 tons per minute. The steel sheet does not develop pin hole defects or press cracks caused by inclusions when used for applications such as motor housings or oil filter housings requiring severe press forming.

REFERENCES:
patent: 3512574 (1970-05-01), Taylor
patent: 3950191 (1976-04-01), Ito et al.
patent: 4113166 (1978-09-01), Olsson
patent: 4950336 (1990-08-01), Tomita et al.
patent: 58-073716 (1983-05-01), None
patent: 402030711 (1990-02-01), None
patent: 04-099842 (1992-03-01), None
patent: 2672889 (1992-07-01), None
patent: 405239537 (1993-09-01), None
patent: 6-17111/1994 (1994-01-01), None
patent: 6-172925/1994 (1994-06-01), None
patent: 406287640 (1994-10-01), None
patent: 7-207403/1995 (1995-08-01), None
patent: 08-104945 (1996-04-01), None
patent: 11-36045/1999 (1999-02-01), None
patent: 11-279678/1999 (1999-10-01), None
patent: 11-279721/1999 (1999-10-01), None
patent: 11-335719 (1999-12-01), None
patent: 2000-001742 (2000-01-01), None
patent: 2000-001744 (2000-01-01), None
patent: 2000-001745 (2000-01-01), None
patent: 2000-1746 (2000-01-01), None
patent: 2000-001746 (2000-01-01), None
patent: 2000-054031 (2000-02-01), None
patent: 2000129332 (2000-05-01), None
patent: 2000-239729 (2000-09-01), None
patent: 2000-303144 (2000-10-01), None
Metals Handbook, Desk Edition, 2ndEdition, ASM Interantional, 1998, pp. 220-221.
Machine Translation of JP 2000-054031.
ASM Handbook, vol. 9, Metallography and Mixrostructures, sixth printing, Jan. 1995, ASM International, p. 537.
English Abstract of Japanese publication 2000144330A, Derwent 416079, May 26, 2000.
Partial Machine Translation of Japan Kokai 2004-169141 (paragraph [0017]).
Partial Machine Translation of Japan Kokai 2001-73098 (paragraph [0026]).

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