Method of treating boron-containing steel

Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes

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75 53, C21C 700

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active

042512689

ABSTRACT:
A method of treating boron-containing steel for continuous casting, especially for teeming or pouring into small sectional shapes or formats with unregulated nozzles. There is introduced into the molten steel located in the casting ladle, by means of an inert carrier gas, in a powder form calcium or a compound thereof, at least one element forming a stable nitride at the melt temperature of the steel and boron or a boron compound. The thus treated steel is protected from renewed reaction with air along its path between the ladle and the continuous casting mold.

REFERENCES:
patent: 2755181 (1956-07-01), Spire
patent: 2768892 (1956-10-01), Shoenberger
patent: 3467167 (1969-09-01), Mahin
patent: 3575695 (1971-04-01), Mivashita
patent: 4129439 (1978-12-01), Nashiwa

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