CAST IRON Russian patent published in 1999 - IPC

FIELD: ferrous metallurgy. SUBSTANCE: invention is designed for production of cast irons which can be used for manufacturing critical parts, for example, crankshafts, couplings, guides, and bushings of rolling mills. Cast iron is composed of, wt %: carbon 3.7- 4.0, silicon 0.06-1.1, manganese 0.05-1.4, nickel 1.8-2.4, copper 0.6-2.0, chromium 0.1-0.8, vanadium 0.03-0.08, titanium 0.01-0.04, magnesium 0.03-0.1, iron - the balance. Cast iron is characterized by bainite structure in cast state, high strength and plasticity, stretching strength in cast state 800-1000 MPa, yield strength 7-9%, and Brinell hardness 255-300 N. EFFECT: improved working characteristics. 2 tbl