Method of producing low nitrogen steel

Details Method of producing low nitrogen steel Method of producing low nitrogen steel

1975-05-05

1977-01-25

Rosenberg, P. D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 59, C21C 534

Patent

active

040049205

ABSTRACT:
In bottom blown processes for the production of low carbon steels (i.e. less than 0.2% C), inert gas flushing employed at an intermediate point of the blow, provides more rapid and more efficient removal of N.sub.2. Thus, inert gas flushing is initiated at a point when the carbon content of the melt is in excess of 0.3%, and preferably in excess of 0.5%. When N.sub.2 is removed to a desired extent, full scale oxygen blowing is resumed to achieve the final degree of decarburization.

REFERENCES:
patent: 3169058 (1965-02-01), Nelson
patent: 3706549 (1972-12-01), Knuppel
patent: 3854932 (1974-12-01), Bishop

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