HIGH-NITROGEN NONMAGNETIC CORROSION-RESISTANT STEEL Russian patent published in 2012 - IPC C22C38/58 B82B1/00 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, particularly dealing with composition of high-nitrogen nonmagnetic corrosion-resistant steel used in mechanical engineering, aircraft building, specific shipbuilding, and for producing high-performance oil drilling equipment. Steel contains, wt %: carbon 0.03 - 0.06, silicon 0.10 - 0.50, manganese 15.0 - 17.00, chromium 25.00 - 27.00, nickel 4.50 - 9.00, molybdenum 0.80 - 1.50, vanadium 0.10 - 0.20, niobium 0.05 - 0.20, nitrogen 0.75 - 1.00, zirconium nitride 0.03 - 0.05, cerium 0.005 - 0.025, calcium 0.005 - 0.02, aluminium 0.005 - 0.02, iron and admixtures making the rest. Zirconium nitride is contained in form of nanodispersible particles.

EFFECT: steel obtains high mechanical properties and is fine-grained.

2 cl, 2 tbl