SEMIFINISHED PRODUCT OF FOUNDRY CAST IRON AND METHOD OF ITS PRODUCTION Russian patent published in 2007 - IPC C22C37/04 C21C1/10 

FIELD: metallurgy; production of foundry cast iron of perfect workability.

SUBSTANCE: proposed semifinished product is made from composition system of white cast iron. Structure contains, independently or in complex, spheroidal or flattened particles of graphite whose outer surface is partially or fully coated with ferrite. Particles are dispersed at density of 50 particles/mm² or more. Cast iron is produced by casting the melt of white cast iron constituents containing the spheroidizing agent. After casting, rolling and heat treatment are performed for obtaining spheroidal particles of graphite or heating and hot rolling are performed for obtaining flattened particles of graphite.

EFFECT: enhanced workability; good characteristics of dampening vibrations and absorbing sound.

11 cl, 4 dwg, 3 tbl, 7 ex