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Title:
METHOD FOR MANUFACTURING HIGH-NITROGEN STEEL
Document Type and Number:
Japanese Patent JP2003055709
Kind Code:
A
Abstract:

To efficiently manufacture steel containing nitrogen in high concentration without contamination of impurities in a short time.

In the process wherein steel is melted in a gaseous-nitrogen atmosphere by the use of a pressurized induction furnace to add nitrogen to the resultant molten steel from the atmosphere, a crucible used in the above pressurized induction furnace is constituted of a refractory having a composition consisting of CaO as a principal component with other inevitable impurities.


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Inventors:
SUGIYAMA TAKEFUMI
SUZUKI KAZUHO
SHIBATA TOMOKI
Application Number:
JP2001244470A
Publication Date:
February 26, 2003
Filing Date:
August 10, 2001
Export Citation:
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Assignee:
DAIDO STEEL CO LTD
International Classes:
C21C7/00; C22C38/00; C22C38/38; F27B14/04; F27B14/10; F27D1/00; (IPC1-7): C21C7/00; C22C38/00; C22C38/38; F27B14/04; F27B14/10; F27D1/00
Domestic Patent References:
JP2000212631A2000-08-02
JPH03291358A1991-12-20
Attorney, Agent or Firm:
Koji Nagato



 
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