METHODS FOR PREPARING SUPERALLOY ARTICLES AND RELATED ARTICLES

    公开(公告)号:US20180002794A1

    公开(公告)日:2018-01-04

    申请号:US15198658

    申请日:2016-06-30

    CPC classification number: C22F1/10 C22C19/03 C22C19/05 C22C19/055 C22C19/056

    Abstract: A method for preparing an improved article including a nickel-based superalloy is presented. The method includes heat-treating a workpiece including a nickel-based superalloy at a temperature above the gamma-prime solvus temperature of the nickel-based superalloy and cooling the heat-treated workpiece with a cooling rate less than 50 degrees Fahrenheit/minute from the temperature above the gamma-prime solvus temperature of the nickel-based superalloy so as to obtain a cooled workpiece. The cooled workpiece includes a coprecipitate of a gamma-prime phase and a gamma-double-prime phase, wherein the gamma-prime phase of the coprecipitate has an average particle size less than 250 nanometers. An article having a minimum dimension greater than 6 inches is also presented. The article includes a material having a coprecipitate of a gamma-prime phase and a gamma-double-prime phase, wherein the gamma-prime phase of the coprecipitate has an average particle size less than 250 nanometers.

    SUPERALLOYS AND COMPONENTS FORMED THEREOF
    6.
    发明申请
    SUPERALLOYS AND COMPONENTS FORMED THEREOF 有权
    形成的超级合金和组分

    公开(公告)号:US20140205449A1

    公开(公告)日:2014-07-24

    申请号:US13948463

    申请日:2013-07-23

    Abstract: A gamma prime nickel-base superalloy and components formed therefrom that exhibit improved high-temperature dwell capabilities, including creep and hold time fatigue crack growth behavior. A particular example of a component is a powder metallurgy turbine disk of a gas turbine engine. The gamma-prime nickel-base superalloy contains, by weight: 16.0 to 30.0% cobalt; 9.5 to 12.5% chromium; 4.0 to 6.0% tantalum; 2.0 to 4.0% aluminum; 2.0 to 3.4% titanium; 3.0 to 6.0% tungsten; 1.0 to 4.0% molybdenum; 1.5 to 3.5% niobium; up to 1.0% hafnium; 0.02 to 0.20% carbon; 0.01 to 0.05% boron; 0.02 to 0.10% zirconium; the balance essentially nickel and impurities. The superalloy has a W+Nb−Cr value of at least −6, is free of observable amounts of sigma and eta phases, and exhibits a time to 0.2% creep at 1300° F. and 100 ksi of at least 1000 hours.

    Abstract translation: 一种伽马级镍基超级合金以及由此形成的部件具有改善的高温驻留能力,包括蠕变和保持时间疲劳裂纹扩展行为。 组件的一个具体实例是燃气涡轮发动机的粉末冶金涡轮盘。 所述γ型镍基超合金含有:16.0〜30.0重量%的钴; 9.5〜12.5%铬; 4.0〜6.0%的钽; 2.0〜4.0%铝; 2.0〜3.4%钛; 3.0〜6.0%的钨; 1.0〜4.0%的钼; 1.5〜3.5%铌; 高达1.0%的铪; 0.02〜0.20%的碳; 0.01〜0.05%硼; 0.02〜0.10%的锆; 余量基本上是镍和杂质。 超合金具有至少为-6的W + Nb-Cr值,没有可观察到的σ和η相的量,并且在1300°F和100ksi至少1000小时时显示出0.2%的蠕变时间。

    Gamma prime strengthened nickel superalloy for additive manufacturing

    公开(公告)号:US10577679B1

    公开(公告)日:2020-03-03

    申请号:US16208827

    申请日:2018-12-04

    Abstract: An additive manufactured product, along with methods of its formation, is provided. The additive manufactured product may include a fused multilayer component comprising a nickel superalloy having a composition comprising, by weight: 7% to 11% of cobalt; 9% to 14% of chromium; 1.5% to 8% of molybdenum; up to 8% of tungsten; 4% to 6% of aluminum; 1% to 4% of titanium; up to 4.6% tantalum; up to 2% hafnium; up to 0.04% zirconium; up to 0.05% carbon; up to 0.04% boron; up to 1% niobium; and the balance nickel along with unavoidable residual elements in trace amounts. This composition may have a sum of the weight percentages of zirconium and boron that is up to 0.06%.

    Superalloys and components formed thereof
    9.
    发明授权
    Superalloys and components formed thereof 有权
    由此形成的超合金及其成分

    公开(公告)号:US09518310B2

    公开(公告)日:2016-12-13

    申请号:US13948463

    申请日:2013-07-23

    Abstract: A gamma prime nickel-base superalloy and components formed therefrom that exhibit improved high-temperature dwell capabilities, including creep and hold time fatigue crack growth behavior. A particular example of a component is a powder metallurgy turbine disk of a gas turbine engine. The gamma-prime nickel-base superalloy contains, by weight: 16.0 to 30.0% cobalt; 9.5 to 12.5% chromium; 4.0 to 6.0% tantalum; 2.0 to 4.0% aluminum; 2.0 to 3.4% titanium; 3.0 to 6.0% tungsten; 1.0 to 4.0% molybdenum; 1.5 to 3.5% niobium; up to 1.0% hafnium; 0.02 to 0.20% carbon; 0.01 to 0.05% boron; 0.02 to 0.10% zirconium; the balance essentially nickel and impurities. The superalloy has a W+Nb−Cr value of at least −6, is free of observable amounts of sigma and eta phases, and exhibits a time to 0.2% creep at 1300° F. and 100 ksi of at least 1000 hours.

    Abstract translation: 一种伽马级镍基超级合金以及由此形成的部件具有改善的高温驻留能力,包括蠕变和保持时间疲劳裂纹扩展行为。 组件的一个具体实例是燃气涡轮发动机的粉末冶金涡轮盘。 所述γ型镍基超合金含有:16.0〜30.0重量%的钴; 9.5〜12.5%铬; 4.0〜6.0%的钽; 2.0〜4.0%铝; 2.0〜3.4%钛; 3.0〜6.0%的钨; 1.0〜4.0%的钼; 1.5〜3.5%铌; 高达1.0%的铪; 0.02〜0.20%的碳; 0.01〜0.05%硼; 0.02〜0.10%的锆; 余量基本上是镍和杂质。 超合金具有至少为-6的W + Nb-Cr值,没有可观察到的σ和η相的量,并且在1300°F和100ksi至少1000小时时显示出0.2%的蠕变时间。

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