HIGH-STRENGTH NONMAGMETIC COMPOSITION STEEL Russian patent published in 2009 - IPC C22C38/58 C22C33/02 C22C33/04 B82B1/00 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy field, particularly to composition of high-strength non-magnetic corrosion-resistant composition steel, used in mechanical engineering, aircraft building, special shipbuilding, instrument making and at creation of high-performance drilling engineering. Steel contains carbon, silicon, manganese, chrome, nickel, nitrogen, niobium, molybdenum, vanadium, zirconium nitride, iron and unavoidable admixtures at following ratio of components, wt %: carbon 0.04 - 0.12, silicon 0.10 - 0.60, manganese 5.0 - 12.0, chrome 19.0 - 21.0, nickel 4.0 - 9.0, molybdenum 0.5 - 1.5, vanadium 0.10 - 0.55, niobium 0.03 - 0.30, nitrogen 0.4 - 0.7, zirconium nitride 0.03 - 1.00, iron and unavoidable admixtures are the rest. Zirconium nitride is in the form of particles with nano-dispersibility.

EFFECT: there are increased strength properties of steel at simultaneous increasing of plasticity and viscosity index.

2 cl, 2 tbl, 1 ex