FIELD: metallurgy.
SUBSTANCE: invention relates to metallurgy, namely to production of austenite stainless nanotwinned TWIP steel. Austenitic stainless steel is cast containing, wt%: no more than 0.018 C, 0.25–0.75 Si, 1.5–2 Mn, 17.80–19.60 Cr, 24.00–25.25 Ni, 3.75–4.85 Mo, 1.26–2.78 Cu, 0.04–0.15 N, rest is Fe and unavoidable impurities. Steel is brought to temperature below 0 °C and exposed to plastic deformation with deformation degree of at least 30 % to form nanotwins with average distance between them less than 1,000 nm and density more than 35 %.
EFFECT: steel with high strength is obtained.
13 cl, 9 dwg, 5 tbl
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