| 摘要 |
FIELD: ferrous metallurgy, possibly manufacture of parts used in machine engineering. ^ SUBSTANCE: in order to improve hardenability of steel, the last contains, mass%: carbon, 0.3 - 0.5; silicon, 0.2 - 0.6; manganese, 0.4 - 0.8; boron, 0.8 - 1.2; vanadium, 0.08 - 0.15; aluminum, 3.0 - 4.0; nitrogen, 0.05 - 0.1; magnesium, 0.05 - 0.1; calcium, 0.05 - 0.1; cerium, 0.05 - 0.1; iron, the balance. ^ EFFECT: improved hardenability of steel. ^ 1 tbl |
