CAST IRON Russian patent published in 1994 - IPC

FIELD: metallurgy. SUBSTANCE: cast iron containing carbon, silicon, manganese, chrome, nickel, niobium, zirconium, boron, iron has additionally tungsten and nitrogen at the following ratio of components, wt. -% : carbon 2.5-4.0; silicon 0.4-0.8; manganese 1.8-2.2; chrome 22-25; nickel 0.5-0.8; niobium 0.8-3.0; zirconium 0.05-0.1; boron 0.12-0.2; tungsten 0.7-1.3; nitrogen 0.02-0.03, and iron - the rest. Cast iron is used in machine engineering. EFFECT: enhanced wear-resistance and strength of cast iron. 1 tbl