| 摘要 |
FIELD: metallurgy.SUBSTANCE: proposed composition contains the following substances, in wt %: carbon - 0.22-0.27, silicon - 0.2-0.4, manganese - 0.2-0.6, chromium - 3.3-4.0, cobalt - 8.0-9.5, nickel - 6.0-6.9, molybdenum - 2.5-3.0, tungsten - 0.4-0.6, vanadium - 0.20-0.24, niobium - 0.05-0.15, yttrium - 0.008-0.01, lanthanum - 0.04-0.05, cerium - 0.02-0.03, neodymium - 0.015-0.02, nitrogen - 0.03-0.04, iron making the rest.EFFECT: higher yield, impact strength and heat resistance at ultimate strength ?B making at least 1800 MPa.2 tbl |
