| 摘要 |
A component possessing high resistance to corrosion and oxidation, composed of a dispersion-hardened superalloy having a high creep strength, comprises a coarse-grained core (1) which has high strength at high temperatures, and a fine-grained skin zone (2) which forms a case. The component is manufactured with the aid of a heat-treatment, or thermomechanical treatment, in a manner such that, starting from a fine-grained initial condition, the skin zone (2) is restrained from participating in the recrystallization which leads to the formation of coarse grains in the core (1). |
