Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1982-08-25
1985-11-26
Rosenberg, Peter D.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75 57, C21C 706
Patent
active
045552649
ABSTRACT:
The present invention relates to a process for producing an electrical steel sheet. In order to prevent aging deterioration of the electrical steel sheet, the carbon content of the steel for the sheet should be reduced to an extremely low level, e.g., 0.0030% or less. However, when molten steel was subjected to vacuum-degassing and continuous-casting procedures to prepare steel for a electrical steel sheet in a prior art, although a desired carbon content of the molten steel was ensured at the degassing stage, the carbon content of the steel sometimes exceeded the desired level at the slab range. In the present invention, the prior art problem is solved by carrying out the degassing procedure under conditions in which the ultimate degree of vacuum in the degassing vessel is 1.0 mmHg or less, the rate of inert gas blown per gas-blowing orifice is from 30 to 150 Nl/min, and the final carbon content of the molten steel is 0.0030% or less and by using means contacting the melt during the continuous-casting procedure, the carbon content of said means being 3.0% or less.
REFERENCES:
patent: 3467167 (1969-09-01), Mahin
patent: 3702243 (1972-11-01), Miltenberger
patent: 3761242 (1973-09-01), Finkl
Tetsu-To-Magane, Journal of the Iron and Steel Institute of Japan, Special Issue: Secondary Steelmaking (Nov. 1977).
Masuda Takashi
Oba Katuyuki
Shimoyama Yoshiaki
Takeshita Takeaki
Nippon Steel Corporation
Rosenberg Peter D.
LandOfFree
Process for producing steel for an electrical steel sheet does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for producing steel for an electrical steel sheet, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for producing steel for an electrical steel sheet will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-268174