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Ni based forged alloy, and turbine disc, turbine spacer and gas turbine each using the same
Ni based forged alloy, and turbine disc, turbine spacer and gas turbine each using the same
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机译:镍基锻造合金以及涡轮盘,涡轮垫片和燃气轮机均使用相同的材料
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摘要
The Ni based forged alloy has a composition containing, on the basis of mass percent, Al: 0.5 to 1.0%, Cr: 17 to 21%, Fe: 17 to 19%, Nb: 4.5 to 5.5%, Ti: 0.8 to 1.3%, W: 3. 0 to 6.0%, B: 0.001 to 0.03%, C: 0.001 to 0.015%, and Mo: 1.0% or less, the balance being Ni and inevitable impurities. The alloy includes carbide grains of the contained elements. The carbide grains have an average grain diameter of 20 µm or less. Thus, a Ni based forged alloy is provided which is excellent in high-temperature fatigue property and has a moderate macrosegregation property.
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