GREY CAST IRON OBTAINING METHOD Russian patent published in 2013 - IPC C22C37/10 C22C1/03 

FIELD: metallurgy.

SUBSTANCE: method involves obtaining of molten metal containing carbon, silicon, manganese, chrome, titanium, zirconium and copper as the main alloying components at the following ratio, wt %: carbon 2.9-3.6, silicon 1.2-1.7, manganese 0.2, 0.2-0.5, chrome 0.03-0.08, titanium 0.03-0.08, zirconium 0.02-0.10, copper 0.2-1.5, and iron is the rest, and introduction to molten metal to the bottom of a ladle of 0.03-0.10 wt % of a complex additive based on stannum, which contains the following, wt %: bismuth 14, selenium 14, boron 9, antimony 7, and stannum 7.

EFFECT: improvement of processibility and provision of high strength owing to stabilising pearlite structure in primary dendrites and reducing tendency of cast iron to formation of triple phosphide-cementite eutectics.

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