公开(公告)号：MXPA01008586A

公开(公告)日：2004-12-03

申请号：MXPA01008586

申请日：2001-08-24

Applicant: UNITED TECHNOLOGIES CORP

Inventor： DAVID A RUTZ

IPC: F02C7/00 ,  B23K35/00 ,  B23K35/02 ,  B23K35/14 ,  B23K35/30 ,  B23K35/36 ,  B23K35/363 ,  B23P6/04

Abstract: La presente invencion se refiere a una pasta de soldadura de autolimpieza que se usa en la reparacion de maquinas de turbina de gas. La pasta de soldadura comprende cloruro de litio en una cantidad suficiente para actuar como un fundente que permite que el material de soldadura fluya en una grieta o hueco en una parte que se va a reparar a una cantidad donde no exista litio o fluoruro residual en la grieta o hueco, de manera preferente hasta aproximadamente 20 % en volumen, un aglutinante de gel en una cantidad de hasta aproximadamente 15 % en volumen, y el resto que comprende al menos uno de una aleacion de soldadura de niquel y una adicion de soldadura de cobalto. En una modalidad preferida, el fluoruro de litio esta presente en una cantidad desde aproximadamente 10 % a aproximadamente 15 % en volumen. El material de soldadura de la presente invencion se puede aplicar en una forma de pasta o de manera alternativa en una forma de pintura o cinta. Tambien se describe un metodo para reparar una union de soldadura. El metodo comprende ampliamente los pasos de formar un material de soldadura que contiene fluoruro de litio en el intervalo mencionado anteriormente, un aglutinante de gel en una cantidad desde aproximadamente 15 %, y el resto que comprende al menos uno en aleacion de 25 soldadura de niquel o una aleacion de soldadura de cobalto, aplicando un material de soldadura a la union de soldadura, y calentar el material de soldadura a una temperatura en el intervalo desde aproximadamente una temperatura suficiente para provocar que el fluoruro de litio se volatilice hasta aproximadamente 2300??F durante un periodo de tiempo desde aproximadamente 1.0 minutos hasta aproximadamente 30.0 minutos.

公开(公告)号：ZA879684B

公开(公告)日：1988-09-28

申请号：ZA879684

申请日：1987-12-28

Applicant: UNITED TECHNOLOGIES CORP

Inventor： SCHAEFER ROBERT P ,  ROBERT P SCHAEFER ,  RUTZ DAVID A ,  DAVID A RUTZ ,  LEE EDWARD ,  EDWARD LEE ,  JOHNSON EDWARD L ,  EDWARD L JOHNSON

IPC: B24D3/00 ,  B22F3/10 ,  B24D3/06 ,  C22C1/10 ,  C22C32/00 ,  C23C24/10 ,  F01D5/20 ,  F01D11/00 ,  F16J15/10 ,  C04B ,  C01B ,  B28B ,  F02K

Abstract: An abrasive material (22) comprised of a metal matrix (26) and evenly distributed ceramic particulates (24), is made by mixing powder metal with the ceramic powder and heating to a temperature sufficient to melt most, but not all of the powder. In this way the ceramic does not float to the top of the material, yet a dense material is obtained. A nickel superalloy matrix will have at least some remnants of the original powder metal structure, typically some equiaxed grains, along with a fine dendritic structure, thereby imparting desirable high temperature strength when the abrasive material is applied to the tips of blades of gas turbine engines. Preferred matrices have a relatively wide liquidus-solidus temperature range, contain a melting point depressant, and a reactive metal to promote adhesion to the ceramic.

公开(公告)号：ZA879685B

公开(公告)日：1988-09-28

申请号：ZA879685

申请日：1987-12-28

Applicant: UNITED TECHNOLOGIES CORP

Inventor： SCHAEFER ROBERT P ,  ROBERT P SCHAEFER ,  RUTZ DAVID A ,  DAVID A RUTZ ,  LEE EDWARD ,  EDWARD LEE ,  JOHNSON EDWARD L ,  EDWARD L JOHNSON

IPC: B22F20060101 ,  C04B20060101 ,  C22C20060101 ,  F02K20060101 ,  B22F ,  C04B ,  C22C ,  F02K

公开(公告)号：ZA8709685B

公开(公告)日：1988-09-28

申请号：ZA8709685

申请日：1987-12-28

Applicant: UNITED TECHNOLOGIES CORP

Inventor： SCHAEFER ROBERT P ,  ROBERT P SCHAEFER ,  RUTZ DAVID A ,  DAVID A RUTZ ,  LEE EDWARD ,  EDWARD LEE ,  JOHNSON EDWARD L ,  EDWARD L JOHNSON

IPC: B22F20060101 ,  C04B20060101 ,  C22C20060101 ,  F02K20060101 ,  B22F ,  C04B ,  C22C ,  F02K

公开(公告)号：SG187312A1

公开(公告)日：2013-02-28

申请号：SG2012041810

申请日：2012-06-07

Applicant: UNITED TECHNOLOGIES CORP

Inventor： THOMAS DEMICHAEL ,  RICHARD GERST ,  BRIAN S TRYON ,  DAVID A RUTZ ,  BILLIE W BUNTING

Abstract: REPAIR OF COATED TURBINE VANES INSTALLED IN MODULEA method of repairing a damaged coated vane from a turbine module without removing the vane from the module is taught. The method includes locally removing the coating in the vicinity of the damage as well as any underlying damage in the superalloy substrate. A diffusible coating precursor is then applied to the damage site. A heat treating fixture is then mounted on the vane and repair site is heated to up to 2000°F in an inert environment to interdiffuse the coating precursor and the substrate. After the diffusion anneal, the vane is cleaned and the module is returned to service.Fig. I

公开(公告)号：SG111027A1

公开(公告)日：2005-05-30

申请号：SG200105211

申请日：2001-08-27

Applicant: UNITED TECHNOLOGIES CORP

Inventor： BETH KWIATKOWSKI ABRILES ,  DAVID A RUTZ ,  BRYAN W MANIS

IPC: F02C7/00 ,  B23K35/00 ,  B23K35/02 ,  B23K35/14 ,  B23K35/30 ,  B23K35/36 ,  B23K35/363 ,  B23K1/00 ,  B23P6/04

Abstract: The present invention relates to a self cleaning braze paste which is used in the repair of gas turbine engines. The braze paste comprises lithium fluoride in an amount sufficient to act as a flux which allows the braze material to flow into a crack or void in a part to be repaired up to an amount where there is no residual lithium or fluoride in the crack or void, preferably up to about 20% by volume, a gel binder in an amount up to about 15% by volume, and the balance comprising at least one of a nickel braze alloy and a cobalt braze alloy. In a preferred embodiment, the lithium fluoride is present in an amount from about 10% to about 15% by volume. The braze material of the present invention may be applied in a paste form or, alternatively, in a paint or tape form. A method for cleaning and repairing a braze joint is also disclosed. The method broadly comprises the steps of forming a braze material containing lithium fluoride in the above mentioned range, a gel binder in an amount up to about 15% by volume, and the balance comprising at least one of a nickel braze alloy or a cobalt braze alloy, applying the braze material to the braze joint, and heating the braze material to a temperature in the range of from about a temperature sufficient to cause the lithium fluoride to volatize up to about 2300 DEG F for a time period from about 1.0 minute to about 30.0 minutes.

公开(公告)号：ZA8709684B

公开(公告)日：1988-09-28

申请号：ZA8709684

申请日：1987-12-28

Applicant: UNITED TECHNOLOGIES CORP

Inventor： SCHAEFER ROBERT P ,  ROBERT P SCHAEFER ,  RUTZ DAVID A ,  DAVID A RUTZ ,  LEE EDWARD ,  EDWARD LEE ,  JOHNSON EDWARD L ,  EDWARD L JOHNSON

IPC: B24D3/00 ,  B22F3/10 ,  B24D3/06 ,  C22C1/10 ,  C22C32/00 ,  C23C24/10 ,  F01D5/20 ,  F01D11/00 ,  F16J15/10 ,  C04B ,  C01B ,  B28B ,  F02K

CPC classification number: C22C32/00 ,  B22F1/0003 ,  B22F3/1035 ,  C22C1/1036 ,  F01D5/20

Abstract: An abrasive material (22) comprised of a metal matrix (26) and evenly distributed ceramic particulates (24), is made by mixing powder metal with the ceramic powder and heating to a temperature sufficient to melt most, but not all of the powder. In this way the ceramic does not float to the top of the material, yet a dense material is obtained. A nickel superalloy matrix will have at least some remnants of the original powder metal structure, typically some equiaxed grains, along with a fine dendritic structure, thereby imparting desirable high temperature strength when the abrasive material is applied to the tips of blades of gas turbine engines. Preferred matrices have a relatively wide liquidus-solidus temperature range, contain a melting point depressant, and a reactive metal to promote adhesion to the ceramic.