POURING PRACTICE OF RAIL STEEL AT ENGINE OF CONTINUOUS CASTING OF BLANKS Russian patent published in 2009 - IPC B22D11/04 

FIELD: metallurgy.

SUBSTANCE: from interim ladle steel is fed into composite mold and poured with speed 0.45-0.60 m/min. Steel temperature in interim ladle is higher than the liquidus temperature for 5-35°C. Crystalliser contains cooling plates with vertical ribs in area of plates joint. Cathetus a and b, forming ribs are in ratio a/b=1:(1.0-1.3). Ratio of small cathetus a to small side h of crystalliser is 1:(15-20), ratio of big cathetus b to big side l of crystallizer is 1:(18-24), and ratio of small side h to big side l of crystalliser is 1:1.2. Total area of crystalliser is 1075-1080 cm². Dimensions of crystalliser, located in limits of declared ratios, allows reduction of surface defect of uninterruptedly-casted blanks.

EFFECT: steadfastness increasing of crystalliser and increasing of continuous caster productivity, improving of macrostructure of casted uninterruptedly-casted blanks.

1 dwg