CAST IRON Russian patent published in 1994 - IPC

FIELD: metallurgy. SUBSTANCE: cast iron containing carbon, silicon, manganese, copper, aluminium, calcium, yttrium, iron phosphides, barium nitrides, iron has additionally nickel, molybdenum and boron at the following ratio of components, wt. -% : carbon 3.6-4.0; silicon 2.8-3.3; manganese 4.5-6.0; copper 0.05-0.1; aluminium 0.03-0.08; calcium 0.05-0.08; yttrium 0.07-0.09; iron phosphides 0.09-0.15; barium nitrides 0.045-0.08; nickel 2.9-3.6; molybdenum 0.9-1.3; boron 0.35-0.45, and iron - the rest. EFFECT: prolonged period of exploitation of cast iron articles. 1 tbl