FIELD: ferrous metallurgy.
SUBSTANCE: liner of mold of billet continuous casting machine includes upper funnel like portion and at least two arranged concentrically shaping portions. Funnel like portion has cross section in the form of rounded concave zones whose number is in range 4 - 10. Height of concave zones decreases from zero in boundary between funnel like portion and shaping portion. Length of funnel like portion consists of 30 - 45% of total length of liner. Conicity of funnel-like portion per maximum-concavity zone consists 3 - 10 %/m and between concave zones it is in range 1 - 2%/m.
EFFECT: stable process of drawing cast billet, rigid centering of billet, lowered out-of-roundness, decreased cracking of ingot, increased speed of casting.
2 cl, 3 dwg
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SU1787669A1 |
