Abstract
The article considers conditions for nitrogen bubble formation at the crystallization front for iron and stainless steels. Using the results obtained during plasma-arc remelting, a semi-empirical formula is proposed for calculating maximum permissible nitrogen concentrations. It is shown that during steel crystallization with austenite formation at atmospheric pressure it is possible to obtain dense steel ingots with a nitrogen content exceeding its solubility at the liquidus temperature by a factor of 1.4–1.5.
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