High Temperature Alloys and Methods for Fabricating Same

    公开(公告)号:US20240227006A1

    公开(公告)日:2024-07-11

    申请号:US18405157

    申请日:2024-01-05

    Abstract: An alloy construction for separating a low oxygen content corrosive environment from a high oxygen content oxidizing environment includes a wall having a wall thickness and a first surface segment for contacting the low oxygen content corrosive environment, and a second surface segment for contacting the high oxygen content oxidizing environment. The alloy comprises, in weight percent: 0 to 5 Al; 5 to 30 Cr; 0 to 20 Co; 0 to 70 Fe; 0 to 2 Nb; 0 to 2 Ta; 0 to 3 Ti; 0 to 1 Si; 0 to 1 V; 0 to 2 Mn; 0 to 5 Cu; 0 to 30 Mo; 0 to 30 W; 0 to 0.1 P; 0 to 1 Zr; 0 to 1 Hf; 0 to 0.1 Y; 0.05 to 0.5 C; 0 to 0.1 N; and balance Ni. The alloy is compositionally graded from the first surface segment to the second surface segment. The wall composition has a stable FCC austenitic matrix microstructure, with strengthening phases comprising gamma prime with a volume fraction of 0 to 30% and carbides with a volume fraction of 0 to 5%.

    Precipitation hardenable cobalt-nickel base superalloy and article made therefrom

    公开(公告)号:US11718897B2

    公开(公告)日:2023-08-08

    申请号:US17714518

    申请日:2022-04-06

    CPC classification number: C22C19/07 C22C19/056 C22C19/057 C22C30/00

    Abstract: A precipitation hardenable, cobalt-nickel base superalloy is disclosed. The is characterized by the following weight percent composition.















    C
    about 0.01 to about 0.15



    Cr
    about 6.00 to about 15.00



    Ni
    about 30.00 to about 45.00



    W
    about 3.00 to about 15.00



    Ti
    about 0.50 to about 4.00



    Al
    about 3.00 to about 7.00



    Nb
    up to about 2.50



    Ta
    up to about 6.00



    Hf
    up to about 1.50



    Zr
    up to about 1.50



    B
    up to about 0.20



    Mo
    up to about 2.50



    Si
    up to about 1.50









    The balance of the alloy is cobalt and usual impurities. The alloy provides a novel combination of strength and ductility after long-term exposure to elevated operating temperatures as found in gas turbines and jet engines. A fine-grain steel article made from the alloy is also disclosed. The steel article is also characterized by a continuous surface layer of Al2O3 and Cr2O3 that protects the alloy from oxidation at the elevated operating temperatures.

    Precipitation Hardenable Cobalt-Nickel Base Superalloy And Article Made Therefrom

    公开(公告)号:US20180305792A1

    公开(公告)日:2018-10-25

    申请号:US15958454

    申请日:2018-04-20

    CPC classification number: C22C19/07 C22C19/056 C22C19/057 C22C30/00

    Abstract: A precipitation hardenable, cobalt-nickel base superalloy is disclosed. The is characterized by the following weight percent composition. C about 0.01 to about 0.15 Cr about 6.00 to about 15.00 Ni about 30.00 to about 45.00 W about 3.00 to about 15.00 Ti about 0.50 to about 4.00 Al about 3.00 to about 7.00 Nb up to about 2.50 Ta up to about 6.00 Hf up to about 1.50 Zr up to about 1.50 B up to about 0.20 Mo up to about 2.50 Si up to about 1.50 The balance of the alloy is cobalt and usual impurities. The alloy provides a novel combination of strength and ductility after long-term exposure to elevated operating temperatures as found in gas turbines and jet engines. A fine-grain steel article made from the alloy is also disclosed. The steel article is also characterized by a continuous surface layer of Al2O3 and Cr2O3 that protects the alloy from oxidation at the elevated operating temperatures.

    Ni-BASED SUPERALLOY
    10.
    发明申请
    Ni-BASED SUPERALLOY 审中-公开

    公开(公告)号:US20180245188A1

    公开(公告)日:2018-08-30

    申请号:US15900460

    申请日:2018-02-20

    CPC classification number: C22C19/057 C22C19/05 C22C19/056

    Abstract: The present invention relates to an Ni-based superalloy having a composition containing, in terms of % by mass, C: from 0.1 to 0.3%, Cr: from 8.0 to 12.0%, Mo: from 1.0 to 5.0%, Co: from 10.0 to 20.0%, Ta: from 0.01 to 1.50%, Ti: from 2.0 to 4.2%, Al: from 5.0 to 8.0%, V: from 0 to 1.5%, B: from 0.005 to 0.030%, and Zr: from 0.05 to 0.15%, with the balance being Ni and unavoidable impurities, and satisfying, in terms of atom %, Ti+Al being from 16.0 to 20.3% and Ti/Al being 0.3 or less.

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