| 摘要 |
FIELD: manufacture of parts working under conditions of thermocyclic loading. SUBSTANCE: proposed steel contains components at the following ratio, mas.-%: carbon, 0.5 - 1.5; silicon, 0.4 -0.8; manganese 0.05-0.1; titanium, 2.5-7/5 and iron, remainder. Ultimate strength of steel is sigmaé 450 to 530 Mpa, sigmaÆ 320 to 390 Mpa; ductility delta, 10 to 20 %; impact strength a¡, 1.0 to 2.3 kgm/sq.cm; number of cycles of thermocyclic loading, 330 to 440. EFFECT: enhanced resistance to thermal erosion at retained high level of mechanical properties and reduced amount of alloying components. 2 tbl
|
