CAST IRON MODIFICATION METHOD Russian patent published in 2017 - IPC C21C1/00 C21C1/10 

FIELD: metallurgy.

SUBSTANCE: method of cast iron modification includes introduction of magnesium oxide into composition of lining of casting ladle and its reduction by silicon of liquid cast iron poured into ladle. Silicon-calcium and nano-structured diamond powder are additionally introduced into the ladle lining composition, said ingredients and magnesium oxide are preliminarily mixed and exposed to the action of a silent discharge with a strength of 700…1100 v/m in a boiling layer of materials, and reduction of magnesium from its oxide is performed jointly with nanostructured diamond powder and silicon of liquid cast iron, poured into ladle at temperature 1360…1400°C.

EFFECT: invention makes it possible to modify the cast iron without a pyroeffect by reducing magnesium from its oxide, reduce temperature of cast iron overheating before modification while reducing consumption of spheroidizing mixture, improve physico-mechanical properties of cast iron due to production of spherical graphite and grinding of metal matrix.

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