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    Nickel base superalloy and article
    3.
    发明授权
    Nickel base superalloy and article 失效
    镍基超合金和制品

    公开(公告)号：US5482789A

    公开(公告)日：1996-01-09

    申请号：US176613

    申请日：1994-01-03

    申请人： Kevin S. O'Hara ,  William S. Walston ,  Earl W. Ross ,  Ramgopal Darolia

    发明人： Kevin S. O'Hara ,  William S. Walston ,  Earl W. Ross ,  Ramgopal Darolia

    IPC分类号： C30B29/52 ,  C22C19/03 ,  C22C19/05 ,  C30B11/00 ,  B32B15/00

    CPC分类号： C22C19/057 ,  C30B11/00 ,  C30B29/52 ,  Y10T428/1275 ,  Y10T428/12875 ,  Y10T428/12944

    摘要： The present invention provides a nickel base superalloy having an improved combination of stress rupture life and microstructural stability with respect to the formation of TCP phases. A unique feature is the specific combination of the content of elements consisting of Al, Ti and W in a second range defined by their sum in a nickel base superalloy having high contents of rhenium, in excess of 1.3 atomic percent (about 4.0 weight percent) to lower the propensity for TCP phase formation and thus render the alloy more stable at high temperatures. The interaction of Ru with the remaining elements to modify the refractory element phase partitioning provides unique capabilities, causing elements to partition to the gamma phase or the gamma prime phase in a reverse direction than normally experienced in Ni-base superalloys. These Ni-base superalloys are termed Ru-containing Reverse Partitioning Ni-base Superalloys. The composition of these Reverse Partitioning Ni-base superalloys is in the range, in atomic percent, of 1.3-3% Re, 2.0-3.7% Ta, 4.0-18.0% Co, 0-0.2% Hf, 0-0.3% C, 0-0.05% B, 0-0.03% Y, 0-2.0% Mo, 1.5-7.2% Cr, 0-0.3% Cb, 12.0-15.0% Al, 0-1.3% Ti, 1.0-2.5% W, in combination with 0.25-4.0 Ru and the balance Ni and incidental impurities.

    摘要翻译： 本发明提供了一种镍基超级合金，其相对于TCP相的形成具有改进的应力断裂寿命和微结构稳定性的组合。 一个独特的特征是由Al，Ti和W组成的元素的含量在第二范围内的特定组合，该第二范围由它们的总和在具有高含量的铼的镍基超级合金中限定，超过1.3原子％（约4.0重量％）， 以降低TCP相形成的倾向，从而使合金在高温下更稳定。 Ru与剩余元素的相互作用以改变难熔元素相分配提供独特的能力，使得元素在与Ni基超级合金中通常经历的相反方向上分配到γ相或γ'相。 这些Ni基超合金称为含Ru反向分选Ni基超合金。 这些反向分选的Ni基超级合金的组成在原子百分比范围内在1.3-3％Re，2.0-3.7％Ta，4.0-18.0％Co，0-0.2％Hf，0-0.3％C， 0-0.05％B，0-0.03％Y，0-2.0％Mo，1.5-7.2％Cr，0-0.3％Cb，12.0-15.0％Al，0-1.3％Ti，1.0-2.5％W，组合 用0.25-4.0 Ru，余量为Ni和杂质。

    Cast columnar grain hollow nickel base alloy articles and alloy and heat treatment for making
    4.
    发明授权
    Cast columnar grain hollow nickel base alloy articles and alloy and heat treatment for making 失效
    铸造柱状颗粒空心镍基合金制品和合金和热处理制造

    公开(公告)号：US5173255A

    公开(公告)日：1992-12-22

    申请号：US686882

    申请日：1991-04-17

    申请人： Earl W. Ross ,  Kevin S. O'Hara

    发明人： Earl W. Ross ,  Kevin S. O'Hara

    IPC分类号： C22C19/05 ,  C22F1/10

    CPC分类号： C22C19/057 ,  C22F1/10

    摘要： One form of an improved cast, hollow, columnar grain nickel base alloy article is provided with outstanding elevated temperature stability as represented by oxidation resistance, an improved combination of longitudinal and transverse stress rupture properties, and a thin wall of less than about 0.035 inch, substantially free of cracks. Described is a heat treatment in combination with an alloy for providing such an article.

    摘要翻译： 改进的铸造中空圆柱状镍基合金制品的一种形式具有突出的高温稳定性，如抗氧化性，纵向和横向应力破裂性能的改进组合以及小于约0.035英寸的薄壁， 基本上没有裂缝。 描述了与用于提供这种制品的合金的热处理。

    Nickel-based superalloys for producing single crystal articles having improved tolerance to low angle grain boundaries
    6.
    发明授权
    Nickel-based superalloys for producing single crystal articles having improved tolerance to low angle grain boundaries 失效
    镍基超级合金用于生产对低角度晶界具有改善的耐受性的单晶制品

    公开(公告)号：US5399313A

    公开(公告)日：1995-03-21

    申请号：US955392

    申请日：1992-10-01

    申请人： Earl W. Ross ,  Carl S. Wukusick ,  Warren T. King

    发明人： Earl W. Ross ,  Carl S. Wukusick ,  Warren T. King

    IPC分类号： C30B11/00 ,  C22C19/05

    CPC分类号： C30B11/00 ,  C30B29/52

    摘要： There is provided by the present invention nickel-base superalloys for producing single crystal articles having improved tolerance to low angle grain boundaries and an improved balance between cyclic oxidation and hot corrosion resistance. The improved tolerance arises from the discovery that nickel-base superalloys suitable for casting as single crystal articles can be improved by the addition of small, but controlled, amounts of boron and carbon, and optionally hafnium, and is manifested principally by improved grain boundary strength. As one result of this increased grain boundary strength, grain boundary mismatches far greater than the 6.degree. limit for prior art single crystal superalloys can be tolerated in single crystal articles made from the nickel-base superalloys of this invention. This translates, for example, into lower inspection costs and higher casting yields as grain boundaries over a broader range can be accepted by visual inspection techniques without resort to expensive X-ray techniques. These alloys are especially useful when directionally solidified as hot-section components of aircraft gas turbine engines, particularly rotating blades and stationary vanes. The superalloy contains by weight percent, 7-12 Cr, 5-15 Co, 0.5-5 Mo, 3-12 W, 2-6 Ta, 2-5 Ti, 3-5 Al, 0- 2 Cb, 0.1-0.2 Hf, 0.05-0.07 C, 0.002-0.05 B, and nickel.

    摘要翻译： 本发明提供了用于制造具有改进的对低角度晶界的耐受性的单晶制品的镍基超级合金以及循环氧化和耐热腐蚀性之间的改善的平衡。 改善的耐受性是由于发现适合于作为单晶制品浇注的镍基超耐热合金可以通过加入少量但可控量的硼和碳以及任选的铪来改善，并且主要表现为改善的晶界强度 。 由于这种增加的晶界强度的结果，由本发明的镍基超级合金制成的单晶制品中，可以容忍现有技术的单晶超级合金远远大于6°极限的晶界畸变。 例如，这转化为较低的检查成本和更高的铸造产量，因为在更宽范围内的晶界可以通过目视检查技术被接受，而不需要昂贵的X射线技术。 当定向凝固为飞机燃气涡轮发动机，特别是旋转叶片和固定叶片的热段部件时，这些合金是特别有用的。 超合金含有重量百分比为7-12 Cr，5-15 Co，0.5-5 Mo，3-12 W，2-6 Ta，2-5 Ti，3-5 Al，O-2 Cb，0.1-0.2 Hf，0.05-0.07℃，0.002-0.05B和镍。