PROCEDURE FOR MELTING STAINLESS STEEL OF TRANSIENT CLASS

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FIELD : metallurgy. SUBSTANCE : invention refers to metallurgy, particularly to rust less process for steel of transient class in vacuum installations. According to the procedure there is used source steel with indices of magnetic induction at a low limit. Charge is melt at temperature 1400-1420°C and in high vacuum 1.10-1 -1.10-2 mm of m.c. whereupon melt is heated to temperature of skin disperse 1700-1730°C at relatively low pressure of 20-50 mm of m.c. in medium of inert gas. Deoxidisation with alloy containing rare earth element is performed 2-3 minutes before tapping in vacuum or in medium of inert gas. EFFECT : upgraded level of mechanic properties of steel required for production of thin walled large size casts. 1 tbl, 1 ex