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    1.
    发明专利
    未知

    公开(公告)号：DE602006001814D1

    公开(公告)日：2008-08-28

    申请号：DE602006001814

    申请日：2006-09-19

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： JUDGE NICHOLAS D ,  LOMASNEY GARY M ,  PARKOS JOSEPH J JR

    IPC: B22C9/04

    Abstract: A method for forming an investment casting core (20) comprises cutting a patterned core precursor from refractory metal-based sheet. The cutting forms recast (24) along the cuts. An oxide (26) is grown on non-recast areas. The recast (24) is substantially chemically removed but substantially leaving the oxide (26). The core precursor may then be shaped.

    2.
    发明专利
    未知

    公开(公告)号：FR2711181B1

    公开(公告)日：1996-06-28

    申请号：FR9412223

    申请日：1994-10-13

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： FRELING MELVIN ,  GRUVER GARY A ,  PARKOS JOSEPH J JR ,  WELCH DOUGLAS A

    IPC: F01D5/20 ,  F01D5/28 ,  F04D29/02 ,  F04D29/08 ,  F01D5/14 ,  F04D29/32 ,  F04D29/38 ,  F01D11/12

    Abstract: A method and apparatus for increasing blade fatigue strength in a turbine engine. The blades in the turbine engine are configured so as to reduce stress at the tip of the blades during operation of the turbine engine, thus increasing blade fatigue strength. This stress reduction helps to counteract the detrimental effect of abrasive tip coatings on blade fatigue strength. In one embodiment, the tip of the blade is chamfered in order to reduce the stress on the tip of the blade. An abrasive coating is then applied to the tip of the blade to assist the blade in seating into an abradable outer air seal. In another embodiment, an abrasive coating is applied to a center portion of the tip of the blade, with the periphery of the abrasive coating being set back from the opposing surfaces of the blade.

    3.
    发明专利
    未知

    公开(公告)号：AT423644T

    公开(公告)日：2009-03-15

    申请号：AT05255424

    申请日：2005-09-05

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： PARKOS JOSEPH J JR ,  LOMASNEY GARY M ,  PERSKY JOSHUA E

    IPC: B22C9/10 ,  B22C9/12

    Abstract: A substrate is coated by applying an essentially pure aluminum first layer to a surface of the substrate. At least a first portion of the first layer is oxidized so as to provide a protective coating of desired properties. The substrate may be a refractory metal-based investment casting core.

    6.
    发明专利
    未知

    公开(公告)号：DE602005012902D1

    公开(公告)日：2009-04-09

    申请号：DE602005012902

    申请日：2005-09-05

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： PARKOS JOSEPH J JR ,  LOMASNEY GARY M ,  PERSKY JOSHUA E

    IPC: B22C9/12 ,  B22C9/10

    Abstract: A substrate is coated by applying an essentially pure aluminum first layer to a surface of the substrate. At least a first portion of the first layer is oxidized so as to provide a protective coating of desired properties. The substrate may be a refractory metal-based investment casting core.

    7.
    发明专利
    未知

    公开(公告)号：AT417686T

    公开(公告)日：2009-01-15

    申请号：AT05255510

    申请日：2005-09-08

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： PERSKY JOSHUA E ,  PARKOS JOSEPH J JR

    IPC: B22C9/10 ,  B22C9/12 ,  C04B35/622 ,  C04B41/45

    Abstract: A substrate is coated by applying a first layer atop the substrate and comprising, in major weight part, a non-refractory first metal. A second layer is applied atop the first layer and comprises, in major weight part, a carbide and/or nitride of a second metal. A third layer is applied atop the second layer and comprises, in major weight part, a ceramic. The substrate may be a refractory metal-based investment casting core.

    8.
    发明专利
    未知

    公开(公告)号：FR2711181A1

    公开(公告)日：1995-04-21

    申请号：FR9412223

    申请日：1994-10-13

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： MELVIN FRELING ,  GRUVER GARY A ,  PARKOS JOSEPH J JR ,  WELCH DOUGLAS A

    IPC: F01D5/20 ,  F01D5/28 ,  F04D29/02 ,  F04D29/08 ,  F01D5/14 ,  F04D29/32 ,  F04D29/38 ,  F01D11/12

    Abstract: A method and apparatus for increasing blade fatigue strength in a turbine engine. The blades in the turbine engine are configured so as to reduce stress at the tip of the blades during operation of the turbine engine, thus increasing blade fatigue strength. This stress reduction helps to counteract the detrimental effect of abrasive tip coatings on blade fatigue strength. In one embodiment, the tip of the blade is chamfered in order to reduce the stress on the tip of the blade. An abrasive coating is then applied to the tip of the blade to assist the blade in seating into an abradable outer air seal. In another embodiment, an abrasive coating is applied to a center portion of the tip of the blade, with the periphery of the abrasive coating being set back from the opposing surfaces of the blade.

    9.
    发明专利
    未知

    公开(公告)号：DE602005011735D1

    公开(公告)日：2009-01-29

    申请号：DE602005011735

    申请日：2005-09-08

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： PERSKY JOSHUA E ,  PARKOS JOSEPH J JR

    IPC: B22C9/10 ,  B22C9/12 ,  C04B35/622 ,  C04B41/45

    Abstract: A substrate is coated by applying a first layer atop the substrate and comprising, in major weight part, a non-refractory first metal. A second layer is applied atop the first layer and comprises, in major weight part, a carbide and/or nitride of a second metal. A third layer is applied atop the second layer and comprises, in major weight part, a ceramic. The substrate may be a refractory metal-based investment casting core.

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