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    Method of improving environmental resistance of investment cast superalloy articles
    2.
    发明授权
    Method of improving environmental resistance of investment cast superalloy articles 失效
    投资超高合金制品的耐环境性改善方法

    公开(公告)号：US06500283B1

    公开(公告)日：2002-12-31

    申请号：US08946017

    申请日：1997-10-07

    申请人： Jon C. Schaeffer ,  Wendy H. Murphy ,  Norman R. Lindblad

    发明人： Jon C. Schaeffer ,  Wendy H. Murphy ,  Norman R. Lindblad

    IPC分类号： C22F110

    CPC分类号： B22C3/00 ,  B22C9/10 ,  C22F1/10

    摘要： A method for promoting the environmental resistance of nickel, iron and cobalt-base superalloys of the type alloyed to develop a protective oxide scale. The method entails a technique for removing sulfur during or subsequent to the casting operation. The method generally includes casting a superalloy article in a mold cavity, and then heat treating the article while surfaces of the article are in contact with a compound containing a sulfide and/or oxysulfide-forming element, such as yttria, calcium oxide, magnesia, scandia, ceria, hafnia, zirconia, titania, lanthana, alumina and/or silica. The heat treatment is performed at a temperature sufficient to cause sulfur within the superalloy article to segregate to the surfaces of the article and react with the sulfide-forming element, thereby forming sulfides at the interface with the compound. The compound is then removed from the surfaces of the article so as to simultaneously remove the sulfides and any elemental sulfur that have segregated to the surface of the article.

    摘要翻译： 一种促进合金化的镍，铁和钴基超级合金的耐环境性的方法，以形成保护性氧化皮。 该方法需要一种在铸造操作期间或之后除去硫的技术。 该方法通常包括在模腔中铸造超合金制品，然后在制品的表面与含有硫化物和/或氧硫化物形成元素如氧化钇，氧化钙，氧化镁， 猩猩，二氧化铈，铪，氧化锆，二氧化钛，镧，氧化铝和/或二氧化硅。 热处理在足以使超合金制品内的硫分离到制品的表面并与硫化物形成元素反应的温度下进行，从而在与化合物的界面处形成硫化物。 然后将化合物从制品的表面除去，以便同时除去分离到制品表面的硫化物和任何元素硫。

    Ni-base Eutectic alloy article and heat treatment
    7.
    发明授权
    Ni-base Eutectic alloy article and heat treatment 失效
    镍基共晶合金制品和热处理

    公开(公告)号：US4305761A

    公开(公告)日：1981-12-15

    申请号：US121627

    申请日：1980-02-14

    申请人： Charles A. Bruch ,  Wendy H. Murphy

    发明人： Charles A. Bruch ,  Wendy H. Murphy

    IPC分类号： C30B33/00 ,  C22F1/10

    CPC分类号： C30B33/00 ,  C30B29/52 ,  Y10T428/12486

    摘要： An improved columnar grained, polycrystalline, anisotropic article is provided of a Ni-base, carbide fiber reinforced eutectic alloy by a method of providing a unidirectionally solidified cast body which includes such fibers aligned and embedded in a gamma-gamma prime structure. Such body is heated at a first temperature to fully solution the gamma-gamma prime without melting the carbide fibers; exposed to a second, lower, temperature to precipitate fine gamma prime in substantially cuboidal shape within the size range of 1-4 microns; and exposed to a third, still lower, temperature to perfect such cuboidal structure without refinement or coarsening. The resultant article is characterized by improved longitudinal stress rupture life.

    摘要翻译： 通过提供单向凝固的铸造体的方法，由Ni基碳化物纤维增强的共晶合金提供改进的柱状晶粒，多晶，各向异性制品，该铸造体包括对准并嵌入γ-γ原子结构的这种纤维。 将这种体在第一温度下加热以完全溶解γ-γ原料而不熔化碳化物纤维; 暴露于第二个较低的温度以在1-4微米的尺寸范围内以基本上呈立方形的形状沉淀出细小的γ原子; 并暴露于第三，仍然较低的温度以完善这种立方体结构，而不会细化或粗化。 所得制品的特征在于改善纵向应力断裂寿命。

    Alloy powder mixture for brazing of superalloy articles
    9.
    发明授权
    Alloy powder mixture for brazing of superalloy articles 失效
    合金粉末混合物用于钎焊超合金制品

    公开(公告)号：US5240491A

    公开(公告)日：1993-08-31

    申请号：US726495

    申请日：1991-07-08

    申请人： David E. Budinger ,  Stephen J. Ferrigno ,  Wendy H. Murphy

    发明人： David E. Budinger ,  Stephen J. Ferrigno ,  Wendy H. Murphy

    IPC分类号： B23K35/30

    CPC分类号： B23K35/3033 ,  B23K35/304 ,  B23K35/3046 ,  Y10T428/12861 ,  Y10T428/12931 ,  Y10T428/12944

    摘要： A series of braze materials for brazing superalloy substrates at effective brazing temperatures above about 2300.degree. F. is described. The braze materials are formulated as mixtures of cobalt- and nickel-base alloy powders. Each such braze material contains at least two components, one of which is predominantly liquid at the effective brazing temperature, and one of which remains substantially solid at that temperature. The brazing materials solidify by an isothermal solidification process. Unless otherwise limited by the temperature capability of the superalloy substrate being joined, these brazing alloys provide joints that have useful strength at temperatures significantly higher than joints made with prior art brazing alloys.

    摘要翻译： 描述了一种用于在高于约2300°F的有效钎焊温度下钎焊超级合金基底的钎焊材料。 钎焊材料被配制成钴和镍基合金粉末的混合物。 每个这样的钎焊材料含有至少两种组分，其中一种组分在有效钎焊温度下主要是液体，其中一种在该温度下基本上保持固体。 钎焊材料通过等温凝固过程固化。 除非被接合的超级合金基底的温度能力限制，否则这些钎焊合金提供的接头在显着高于现有技术钎焊合金的接头温度下具有有用的强度。

    Method for making a coated Ni base superalloy article of improved microstructural stability
    10.
    发明授权
    Method for making a coated Ni base superalloy article of improved microstructural stability 失效
    制备具有改善的微结构稳定性的涂覆的Ni基超级合金制品的方法

    公开(公告)号：US5695821A

    公开(公告)日：1997-12-09

    申请号：US528273

    申请日：1995-09-14

    申请人： Wendy H. Murphy ,  William S. Walston

    发明人： Wendy H. Murphy ,  William S. Walston

    IPC分类号： B32B15/01 ,  C22C19/00 ,  C22F1/10 ,  C23C10/02 ,  C23C10/48 ,  C23C10/52 ,  B05D3/00

    CPC分类号： C22F1/10 ,  B32B15/01 ,  C23C10/02 ,  C23C10/48 ,  C23C10/52

    摘要： A coated Ni base superalloy article is provided with improved microstructural stability under a coating at least partially diffused into an article surface portion, by avoiding the formation, after exposure to elevated temperatures, of a constituent called SRZ which can affect detrimentally mechanical properties of the article. Such avoidance can result from neutralizing stress in the article surface portion prior to coating, for example by physically removing the stressed portion or by recrystallizing the stressed portion to a fine grained structure which subsequently can be consumed by diffusing elements in a coating method. Also, such avoidance can result from maintaining a Re segregation factor, Re.DELTA., between dendrite cores and interdendritic regions of the alloy cast structure at no greater than about 40%.

    摘要翻译： 涂覆的Ni基超级合金制品在至少部分扩散到制品表面部分的涂层下具有改善的微结构稳定性，通过避免在暴露于高温之后形成称为SRZ的成分，其可影响制品的机械性能 。 这样的回避可以由涂覆前的制品表面部分的中和应力引起，例如通过物理去除受压部分或通过将应力部分重结晶成细粒状结构，随后可以通过涂布法中的扩散元件消耗。 此外，这种回避可以由在合金铸造结构的枝晶核和枝晶间区域之间维持不大于约40％的Re偏析因子Re DELTA引起。