| 摘要 |
FIELD: metallurgy, in particular economically doped high strength casting steel. ^ SUBSTANCE: Claimed steel has martensite structure, high field-performance credibility at temperature from -20 to 20oC and contains the next doping components (mass %): carbon 0.47-0.55; manganese 0.5-0.8; silicium 0.2-0.4; chrome 1.8-2.5; nickel 1.5-2.0; vanadium 0.08-0.12; molybdenum 0.2-0.3; aluminum 0.03-0.06; cerium 0.005-0.05; calcium 0.001-0.01; barium 0.001-0.01. Meet shredding cutter can be surely developed without of regrinding during 29-37 h and up to breakdown during 270-285 h. ^ EFFECT: steel with increased mechanical properties, durability, and crack resistance. ^ 3 tbl |
