PROCEDURE FOR PRODUCTION OF CONTINUOUS CAST WORK PIECE OF UPGRADED QUALITY

摘要

FIELD: metallurgy.;SUBSTANCE: procedure consists in steel melting, in refining, modifying, in casting into crystalliser and in introducing macro-coolers into crystalliser. The macro-coolers (Mc) correspond to melt band steel elements of 0.4 to 2.8 mm thickness. Simultaneously with macro-coolers modifiers (Mm) are introduced into the crystalliser. Summary amount of macro-coolers and modifiers is (Mm+Mc)=(0.0004÷0.009)Ms at ratio Mm:Mc≤(0.003÷0.7), where Ms - is weight of steel in the crystalliser.;EFFECT: increased dispersion of crystal structure of continuous cast work pieces, reduced degree of liquation of chemical elements both in axial zone and along whole cross section of work pieces.;9 cl, 7 dwg, 3 ex