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    • 7. 发明申请
    • Repair of nickel-based alloy turbine disk
    • 镍基合金涡轮盘修复
    • US20050050705A1
    • 2005-03-10
    • US10938713
    • 2004-09-10
    • David SegletesBrij SethSrikanth KottilingamPeter Ditzel
    • David SegletesBrij SethSrikanth KottilingamPeter Ditzel
    • B63H1/16F01D5/00F03B3/12
    • F01D5/005F05D2230/232F05D2230/30F05D2300/606F05D2300/607Y10T29/49318Y10T29/49726Y10T29/4973Y10T29/49732Y10T29/49734Y10T29/49737Y10T29/49742Y10T29/49746
    • A method of adding material to a nickel-based superalloy component, such as a gas turbine rotor disk, without damaging the underlying material and without creating an unacceptable level of cracking. The method is advantageously applied in the repair of Alloy 706 turbine rotors having experienced operating failures in the steeple region of the disk. Once the damaged material is removed, replacement nickel-based superalloy material is added using a welding process that protects both the underlying material and the replacement material. The replacement material may be added by welding, with the preheat temperature maintained no lower than 100° C. below the aging temperature of the deposited alloy and with the interpass temperature maintained below the solution annealing temperature of the alloy. Alternatively, the replacement material may be preformed and welded to the original material using a friction welding process. In one embodiment, a replacement steeple of directionally solidified or single crystal material is installed onto a disk hub using a linear friction welding technique.
    • 将材料添加到镍基超级合金部件(例如燃气轮机转子盘)上而不损坏下面的材料并且不产生不可接受的开裂水平的方法。 该方法有利地应用于在盘的尖顶区域中经历操作故障的合金706涡轮转子的修复中。 一旦损坏的材料被去除,使用保护底层材料和替换材料的焊接工艺来添加替代的镍基超级合金材料。 替代材料可以通过焊接加入,预热温度保持在低于沉积合金的老化温度以下的100℃以下,层间温度保持在合金的固溶退火温度以下。 或者,可以使用摩擦焊接方法将更换材料预成型并焊接到原始材料。 在一个实施例中,使用线性摩擦焊接技术将定向凝固或单晶材料的替换尖顶安装到盘毂上。
    • 9. 发明授权
    • Consumable insert and method of using the same
    • 消耗品插入物及其使用方法
    • US07775414B2
    • 2010-08-17
    • US10679080
    • 2003-10-04
    • Peter J. DitzelSrikanth Kottilingam
    • Peter J. DitzelSrikanth Kottilingam
    • B23K35/14
    • B23K35/0266B23K35/0272B23K35/3033
    • A consumable insert (10) formed of material particles (14) contained within a sheath (12). The particles may be a melting point depressant that has a concentration that is greater in a center region (16) of the insert than in the surface region (18) of the insert, thereby facilitating complete melting of the insert during a transient liquid phase bonding process. Alternatively, the particles may be a low-ductility material, such as a superalloy or an MCrAlY alloy, contained within a high ductility sheath material formed into a ribbon shape, thereby allowing the low-ductility material to be delivered in ribbon form during a coating process.
    • 由包含在护套(12)内的材料颗粒(14)形成的可消耗插入件(10)。 颗粒可以是在插入件的中心区域(16)中具有比在插入件的表面区域(18)中大的浓度的熔点抑制剂,从而有助于在瞬态液相粘合期间插入物的完全熔化 处理。 或者,颗粒可以是包含在形成为带状的高延展性护套材料中的低延展性材料,例如超合金或MCrAlY合金,从而允许低延展性材料在涂层期间以带状输送 处理。
    • 10. 发明申请
    • Heat treatment of superalloy components
    • 超级合金部件的热处理
    • US20060042729A1
    • 2006-03-02
    • US10932718
    • 2004-09-02
    • Srikanth KottilingamPeter Ditzel
    • Srikanth KottilingamPeter Ditzel
    • C22F1/10
    • C22F1/10Y10T29/49336
    • An improved method of heat treating superalloys prior to welding includes subjecting only the portion of the component to be repaired to a localized heat treatment, leaving the remainder of the component untreated. The localized heat treatment permits the use of higher hold temperatures that are near, at, or above the Ni3(Al,Ti) solution temperature of the alloy. Such heat treatment prevents strain age cracking and also prevents recrystallization in areas that are not heat treated. Such localized heat treatment can be applied before and/or after welding, for material rejuvenation, pre-brazing, and post-brazing.
    • 在焊接之前对高温合金进行热处理的改进方法包括只对待修复的部件的一部分进行局部热处理,使组分的其余部分未经处理。 局部热处理允许使用比合金的Ni 3(Al,Ti)溶液温度接近,等于或高于更高的保持温度。 这种热处理可防止应变时效开裂,并且防止在未被热处理的区域中的再结晶。 这种局部热处理可以在焊接之前和/或之后施加,用于材料复原,预钎焊和后钎焊。