| 摘要 |
FIELD: metallurgy. ^ SUBSTANCE: invention concerns metallurgy field. Particularly it concerns steel content used in transportation equipment, machine-tool construction, pump-and-compressor equipment. Steel contains carbon, silicon, manganese, chrome, nickel, molybdenum, vanadium, nitrogen, copper, boron, titanium, niobium and iron at following ratio, wt %: carbon 0.25-0.27, silicon 0.3-0.5, manganese 4.9-5.3, chrome 0.9-1.5, nickel 0.9-1.5, molybdenum 3.4-4.8, vanadium 0.4-0.45, nitrogen 0.07-0.15, copper 0.9-1.7, boron 0.005-0.1, titanium 0.1-0.2, niobium 0.3-0.5, iron is the rest. ^ EFFECT: increasing of steel durability. ^ 1 tbl |
