| 摘要 |
PURPOSE:To manufacture a high strength and high ductility oxide-dispersed super alloy by mixing in a specific ratio the alloy powder of Ni, Co, Fe, etc. in which oxides are dispersed and the alloy powder containing smaller quantity of oxides as additives, and by compacting the mixture. CONSTITUTION:The particles of heat resisting oxides such as Al2O3, Y2O3, etc. (0.8-5.0vol%) are added to the alloy powder having at least 1 kind among Ni, Co, and Fe as principal component and are dispersed uniformly to form metal-oxide composite alloy powder. On the other hand, the heat resisting oxide particles are added to the same alloy powder that is mentioned above in the range not exceeding 0.5% and are dispersed uniformly to form the secondary metal-oxide composite alloy powder. Succeedingly the above composite alloy powder (50-98%) and the secondary composite alloy powder (2-50%) are mixed, and the obtained powder mixture is subjected to plastic deformation at 1,000-1,200 deg.C and to reduction in sectional area while being compacted. In this way, the oxide-dispersed super alloy excelling in strength especially at the high temp. of >=about 900 deg.C and having sufficient ductility in the range from room temp. to high temp. can be obtained.
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