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    Steam turbine different material welded rotor
    26.
    发明授权
    Steam turbine different material welded rotor 有权
    蒸汽轮机不同材料焊接转子

    公开(公告)号：US6152697A

    公开(公告)日：2000-11-28

    申请号：US327557

    申请日：1999-06-08

    Applicant: Tetsu Konishi ,  Ryotaro Magoshi

    Inventor： Tetsu Konishi ,  Ryotaro Magoshi

    IPC: F01D5/02 ,  B23K9/26 ,  F01D5/06 ,  F01D25/00

    CPC classification number: B23P15/006 ,  F01D5/063 ,  B23K2201/001 ,  B23K2203/04 ,  B23K2203/05 ,  B23K2203/18

    Abstract: A steam turbine different material welded rotor, constructed by rotors of different materials being jointed together by welding has the strength of a jointed portion increased and inspection of the jointed portion facilitated. A bearing portion rotor 1 and high temperature portion rotor 2 are jointed at weld portion A, the high temperature portion rotor 2 and low temperature portion rotor 3 at weld portion B and the low temperature portion rotor 3 and bearing portion rotor 4 at weld portion C. Cavity portions 5, 6 are formed in the weld portions B, C, respectively. Inspection holes 7, 8 are also provided in the weld portions B, C. The high temperature portion rotor 2 is made of high heat resistant 12Cr steel and other rotors are made of low alloy steel, wherein the rotor 1 is of 2.multidot.1/4 CrMoV steel and the rotors 3, 4 are of 3.multidot.1/2 NiCrMoV steel. Thus, the materials are less expensive and inspection of the weld portions becomes facilitated by the inspection holes 7, 8 and the cavity portions 5, 6.

    Abstract translation: 由不同材料转子构成的蒸汽涡轮机不同材料的焊接转子通过焊接接合在一起，具有接合部分的强度增加，并且接合部分的检查变得容易。 轴承部分转子1和高温部分转子2在焊接部分A，高温部分转子2和低温部分转子3处在焊接部分B和低温部分转子3以及轴承部分转子4的焊接部分C 分别在焊接部分B，C中形成腔部5,6。 检查孔7,8也设置在焊接部分B，C中。高温部分转子2由高耐热12Cr钢制成，其他转子由低合金钢制成，转子1为2x + E， 1/4 + EE CrMoV钢，转子3,4分别为3x + E，1/2 + EE NiCrMoV钢。 因此，材料成本较低，并且通过检查孔7,8和空腔部5,6便可以使焊接部的检查变得容易。

    Airfoil for a gas turbine engine and method of manufacture
    28.
    发明授权
    Airfoil for a gas turbine engine and method of manufacture 失效
    用于燃气涡轮发动机的翼型及其制造方法

    公开(公告)号：US6003754A

    公开(公告)日：1999-12-21

    申请号：US954907

    申请日：1997-10-21

    Applicant: Jeffrey F. Rhodes

    Inventor： Jeffrey F. Rhodes

    IPC: B22C7/00 ,  B22C7/02 ,  B22C9/04 ,  B22C9/06 ,  B23K20/02 ,  B23K31/02 ,  B23K37/04 ,  B23K20/00

    CPC classification number: B23K31/02 ,  B22C7/00 ,  B22C7/02 ,  B22C9/04 ,  B22C9/06 ,  B23K20/02 ,  B23K37/0443 ,  B23K2201/001 ,  Y10T29/49336

    Abstract: A fabricated gas turbine engine component and method of manufacturing. In one embodiment the component having a structural member with a cover member metalurgically bonded thereto. The bonding of the cover member being controlled by an apparatus that sequentially applies a substantially non-unifrom bonding load across the components radius of curvature. The patterns utilized in the casting process are formed in one embodiment to a precision preformed geometry by a closed die forming operation.

    Abstract translation: 一种制造的燃气涡轮发动机部件及其制造方法。 在一个实施例中，所述部件具有结构部件，所述结构部件具有与其结合的盖部件。 覆盖构件的结合由一种装置控制，该装置在整个曲率半径上依次施加基本上非单一的结合载荷。 在一个实施例中，在铸造工艺中使用的图案通过封闭的模具形成操作形成精确的预成型几何形状。

    Rotor repair system and technique
    30.
    发明授权
    Rotor repair system and technique 失效
    转子修复系统和技术

    公开(公告)号：US5914055A

    公开(公告)日：1999-06-22

    申请号：US65886

    申请日：1998-04-24

    Applicant: Blaine W. Roberts ,  William H. Zielke ,  Arun Puri ,  Michael Jirinec ,  Frank Novak

    Inventor： Blaine W. Roberts ,  William H. Zielke ,  Arun Puri ,  Michael Jirinec ,  Frank Novak

    IPC: B23K9/04 ,  F01D5/00

    CPC classification number: B23P6/007 ,  B23K9/044 ,  F01D5/005 ,  B23K2201/001

    Abstract: A system for repairing worn, distorted, cracked, or degraded portions of high temperature rotors such as those used in high-pressure and reheat steam turbines is disclosed. The repairs are applicable to low alloy steels generally described in ASTM Specification A-470 classes 3, 7, and 8. Explicit controls on the welding process, the welding consumables, and the placement of the weld fusion line are disclosed. For the welding process, a novel staging of the "relative heat input" for applying the initial cold wire gas tungsten arc weld (GTAW) buttering layer is disclosed. Significantly, the optimum weldment properties are achieved in the cold wire GTAW by utilizing a lower heat input for the crucial second layer relative to the first layer. Faster deposition or weld build-up is achieved over the buttering layer by applying the balance of welding through utilization of the hot-wire GTAW process. Hot-wire weld integrity is assured by control of a helium-argon cover gas mixture, application of a trailing gas shroud, weld-head oscillation, and control of the wire insertion point into the molten puddle. For the weld deposit, a specially modified 9Cr-1Mo filler metal based on the "Grade 91" alloy developed by the Oak Ridge National Laboratory is selected. Additional stringent controls are placed on the chemical composition of the weld wire. Finally, judicious placement of the weld fusion line to insure long service is achieved by a detailed finite-element stress analysis. Near the fusion line, the stresses are limited to values below the minimum stress-rupture strength of the base metal as described by a correlation using the Larson-Miller time-temperature parameter.

    Abstract translation: 公开了一种用于修复诸如在高压和再热汽轮机中使用的高温转子的磨损，变形，破裂或退化部分的系统。 这些修理适用于通常在ASTM规格A-470-3,7和8类中描述的低合金钢。公开了焊接工艺，焊接材料和焊接熔合线的放置的明确控制。 对于焊接过程，公开了一种用于施加初始冷线气体钨电弧焊（GTAW）电镀层的“相对热输入”的新阶段。 重要的是，通过利用相对于第一层的关键第二层的较低热输入，在冷线GTAW中实现最佳焊接性能。 通过利用热丝GTAW工艺应用焊接平衡，可以在涂层上实现更快的沉积或焊接。 通过控制氦氩气覆盖气体混合物，施加尾气罩，焊接头振荡以及将熔丝插入点控制在熔融熔池中来确保热丝焊接完整性。 对于焊接沉积物，选择了由Oak Ridge国家实验室开发的基于“91级”合金的特殊改性的9Cr-1Mo填充金属。 额外的严格控制放置在焊丝的化学成分上。 最后，通过详细的有限元应力分析实现了焊接熔合线的明智放置以确保长期使用。 在融合线附近，如通过使用Larson-Miller时间 - 温度参数的相关性所述，应力被限制在低于贱金属的最小应力 - 断裂强度的值。

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