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42 条记录 (耗时 0.018 秒)

    Processing of nickel aluminide material
    31.
    发明授权
    Processing of nickel aluminide material 失效
    镍铝材料的加工

    公开(公告)号：US06571857B2

    公开(公告)日：2003-06-03

    申请号：US10037127

    申请日：2001-11-07

    申请人： Ramgopal Darolia ,  Joseph David Rigney

    发明人： Ramgopal Darolia ,  Joseph David Rigney

    IPC分类号： B22D2700

    CPC分类号： C22C1/023

    摘要： A process for casting and preparing an ingot of a beta-phase NiAl-based material, particularly for use in PVD coating processes. The method entails melting a nickel-aluminum composition having an aluminum content below that required for stoichiometric beta-phase NiAl intermetallic so as to form a melt that includes nickel and Ni3Al. Aluminum is then added to the melt, causing an exothermic reaction between nickel and aluminum as the melt equilibrium shifts from Ni3Al to NiAl. However, the aluminum is added at a rate sufficiently low to avoid a violent exothermic reaction. The addition of aluminum continues until sufficient aluminum has been added to the melt to yield a beta-phase NiAl-based material. The beta-phase NiAl-based material is then solidified to form an ingot, which is then heated and pressed to close porosity and homogenize the microstructure of the ingot.

    摘要翻译： 一种用于铸造和制备β相NiAl基材料的锭的方法，特别是用于PVD涂覆工艺。 该方法需要熔化铝含量低于化学计量的β相NiAl金属间化合物所需的铝 - 铝组合物，以形成包括镍和Ni3Al的熔体。 然后将铝加入到熔体中，当熔体平衡从Ni3Al转变为NiAl时，引起镍和铝之间的放热反应。 然而，以足够低的速率加入铝以避免剧烈的放热反应。 继续加入铝，直到足够的铝加入到熔体中以产生β相NiAl基材料。 然后将β相NiAl基材料固化以形成锭，然后将其加热和压制以闭合孔隙并均匀化锭的微观结构。

    Oxidation resistant and/or abrasion resistant squealer tip and method for casting same
    35.
    发明授权
    Oxidation resistant and/or abrasion resistant squealer tip and method for casting same 失效
    耐氧化和/或耐磨的尖叫尖端及其铸造方法

    公开(公告)号：US06616410B2

    公开(公告)日：2003-09-09

    申请号：US10041072

    申请日：2001-11-01

    申请人： Richard John Grylls ,  Joseph David Rigney ,  Warren Davis Grossklaus, Jr. ,  Melvin Robert Jackson

    发明人： Richard John Grylls ,  Joseph David Rigney ,  Warren Davis Grossklaus, Jr. ,  Melvin Robert Jackson

    IPC分类号： F01D528

    CPC分类号： F01D5/288 ,  F01D5/28 ,  F01D11/125 ,  F05D2300/143 ,  Y02T50/67 ,  Y10T29/4932

    摘要： The present invention provides for a squealer tip to include some proportion of a highly oxidation-resistant material, and a method for casting same, such that if any environmental coating were removed, the tip would retain some increased level of environmental resistance. The oxidation-resistant material optionally may also be a high abrasion resistance material, such that recession of the tip due to rubbing against a stator would be reduced. In a preferred embodiment, an abrasion-resistant and/or oxidation-resistant material is placed and suitably anchored into the tip region of a wax precursor used to cast a turbine airfoil. During the casting operation, the abrasion-resistant and/or oxidation-resistant material is not completely melted. As the alloy used to form the majority of the turbine blade solidifies, the abrasion and/or oxidation resistant material is incorporated into the turbine airfoil by the solidification of the alloy around it.

    摘要翻译： 本发明提供了一种包括一些比例的高度抗氧化材料的尖叫尖端及其铸造方法，使得如果任何环境涂层被去除，则尖端将保持一些增加的耐环境性水平。 耐氧化材料任选地也可以是高耐磨性材料，从而减少由于摩擦定子而引起的尖端的凹陷。 在优选的实施方案中，将耐磨损和/或抗氧化材料放置并适当地锚定到用于铸造涡轮机翼的蜡前体的尖端区域中。 在铸造操作期间，耐磨损和/或抗氧化材料未完全熔化。 由于用于形成大部分涡轮机叶片的合金固化，所以耐磨损和/或抗氧化的材料通过其周围的合金的固化而结合到涡轮机翼型件中。

    Endurance of NiA1 coatings by controlling thermal spray processing variables
    36.
    发明授权
    Endurance of NiA1 coatings by controlling thermal spray processing variables 失效
    通过控制热喷涂处理变量，NiAl涂层的耐久性

    公开(公告)号：US06485792B1

    公开(公告)日：2002-11-26

    申请号：US09644491

    申请日：2000-08-23

    申请人： Richard John Grylls ,  Joseph David Rigney ,  Matthew David Saylor ,  Theodore Robert Grossman ,  Yuk-Chiu Lau

    发明人： Richard John Grylls ,  Joseph David Rigney ,  Matthew David Saylor ,  Theodore Robert Grossman ,  Yuk-Chiu Lau

    IPC分类号： C23C406

    CPC分类号： C23C4/18 ,  C23C4/08 ,  Y02T50/67

    摘要： A method for applying substantially stoichiometric NiAl to the surface of a superalloy substrate. These coatings are applied to substrates subjected to high temperatures and thermal cycling by providing a powder of the substantially stoichiometric material with the desired minor additions of rare earth elements, Cr or Zr. The coatings are applied by a thermal spray process utilizing hydrogen as a fuel while generating a highly reducing flame. The thermal spray method melts the powder and directs it onto the surface of the turbine component that is to be coated. The powder size is carefully controlled to prevent oxidation of the powder while providing a controlled surface finish. The surface roughness of the bond coat is further mechanically worked to a predetermined surface finish prior to application of the ceramic thermal barrier layer by a PVD method. Thermal barrier systems applied using these carefully controlled predetermined parameters provide outstanding resistance to TBC spallation under conditions of high cyclic stresses.

    摘要翻译： 将基本上化学计量的NiAl施加到超级合金基底的表面上的方法。 通过提供具有理想化学计量的材料的粉末和所需的稀土元素Cr或Zr的少量添加，将这些涂层施加到经受高温和热循环的基底上。 通过使用氢作为燃料的热喷涂方法施加涂层，同时产生高度还原的火焰。 热喷雾法将粉末熔化并将其引导到待涂覆的涡轮机部件的表面上。 仔细控制粉末尺寸以防止粉末氧化，同时提供受控的表面光洁度。 在通过PVD方法施加陶瓷热障层之前，将粘合涂层的表面粗糙度进一步机械加工至预定的表面光洁度。 使用这些仔细控制的预定参数应用的热障系统在高循环应力的条件下提供了出色的耐TBC剥落性能。