FIELD: metallurgy.
SUBSTANCE: method includes passing of electric current through the multi-pole electrodes, partially placed into the conductive molten slag in the furnace with metal cooled walls with the slag face layer, the progressive immersing as it melts in the molten slag, preheated in the passing inductor of the railroad rail, cristallisation and formation of the billet ingot in the water-cooled mould. The temperature of the molten current conducting slag is set to 250÷450°C above the railroad rail steel melting temperature. The controlled partial reflow of the preheated rail with the optimum value of the reflow coefficient is provided by the controlled immersion with the design speed through the molten slag up to the crystalliser. The presence in the crystalliser, in the billet ingot formation area, of the central unmelted part of the rail, which is subjected to the upsetting to the optimum value in the power circuit, while forming the billet ingot in the crystalliser, displaces the ring bath of the liquid steel into the surficial region of the ingot section, increases the ingot crystallisation speed along the entire cross-section and through the broadening provides the favorable conditions for the billet ingot crystallisation with the predominance of the compression stresses, reducing the probability of the billet ingot casting defects formation.
EFFECT: possibility to process the railroad rails of different lengths and wear levels.
10 cl, 9 dwg
