Ni based forged alloy, and turbine disc, turbine spacer and gas turbine each using the same
    2.
    发明公开
    Ni based forged alloy, and turbine disc, turbine spacer and gas turbine each using the same 有权
    Ni-basierte geschmiedete Legierung und Turbinenscheibe,Turbinenabstandshalter und Gurburbine jeweils damit

    公开(公告)号:EP2813590A1

    公开(公告)日:2014-12-17

    申请号:EP14171821.3

    申请日:2014-06-10

    IPC分类号: C22C19/05 F01D5/00 C22B9/16

    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.

    摘要翻译: Ni基锻造合金的组成为以质量%计含有Al:0.5〜1.0%,Cr:17〜21%,Fe:17〜19%,Nb:4.5〜5.5%,Ti:0.8〜1.3 %,W:3.0〜6.0%,B:0.001〜0.03%,C:0.001〜0.015%,Mo:1.0%以下,余量为Ni和不可避免的杂质。 该合金包括所含元素的碳化物颗粒。 碳化物的平均粒径为20μm以下。 因此,提供了具有优异的高温疲劳性能并具有适度的宏观偏析性质的Ni基锻造合金。