THREADED COUPON FOR REPAIR OF SUPERALLOY PART

• US 20180126499A1
• Filed: 11/08/2016
• Published: 05/10/2018
• Est. Priority Date: 11/08/2016
• Status: Abandoned Application

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Eminoglu, Cem Murat, Cui, Yan, Ford, Cody Jermaine, VanTassel, Brad Wilson
• Application Number:
  US15/346,042
• Publication Number:
  US 20180126499A1
• Time in Patent Office: Days
• CPC Class Codes: B23K 1/0018 Brazing of turbine parts
• CPC Class Codes: B23K 2101/001 Turbines
• CPC Class Codes: B23P 6/002 Repairing turbine components, e.g. moving or stationary blades, rotors, B23P6/045 takes precedence
• CPC Class Codes: B23P 6/005 using only replacement pieces of a particular form
• CPC Class Codes: F01D 5/005 Repairing methods or devices
• CPC Class Codes: F01D 5/28 Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion
• CPC Class Codes: F01D 9/02 Nozzles; Nozzle boxes; Stator blades; Guide conduits , e.g. individual nozzles nozzle boxes F01D9/047
• CPC Class Codes: F05D 2220/32 in gas turbines
• CPC Class Codes: F05D 2230/80 Repairing, retrofitting or upgrading methods
• CPC Class Codes: F05D 2300/175 Superalloys

Abstract

A coupon for repairing a part is disclosed. The coupon includes an outwardly threaded body configured to mate with an inwardly threaded opening in a damaged area of the part. The part and/or coupon may include a superalloy. The threaded arrangement converts tensile stresses into shear stresses that allow the repair to exhibit material characteristics as good as or better than the superalloy. A method of using the coupon to repair a part using brazing, and a turbomachine part using the coupon, are also disclosed.

Claims

1. A coupon for repairing a part, the coupon comprising:

an outwardly threaded body configured to mate with an inwardly threaded opening in a damaged area of the part.

2. The coupon of claim 1, wherein the coupon and the part include a superalloy.

3. The coupon of claim 1, further comprising a braze material between a least a portion of the outwardly threaded body and the inwardly threaded opening.

4. The coupon of claim 1, further comprising a braze material extending along at least a portion of an outward-facing junction between outwardly threaded body and the inwardly threaded opening.

5. A method of repairing a part, the method comprising:

removing a damaged area of the part by forming an inwardly threaded opening therein;

inserting an outwardly threaded coupon into the inwardly threaded opening; and

brazing the outwardly threaded coupon to the inwardly threaded opening.

6. The method of claim 5, wherein the brazing includes applying the brazing material to at least one of the outwardly threaded coupon and the inwardly threaded opening prior to the inserting.

7. The method of claim 5, wherein the brazing includes applying the brazing material along an outward-facing junction between the outwardly threaded coupon and the inwardly threaded opening.

8. The method of claim 5, wherein the coupon and the part include a superalloy.

9. The method of claim 5, further comprising removing a portion of the outwardly threaded coupon extending outwardly from the internally threaded opening in the part.

10. A turbomachine part, comprising:

a superalloy;

an inwardly threaded opening in the superalloy; and

an outwardly threaded coupon mating with the inwardly threaded opening.

11. The turbomachine part of claim 10, wherein the coupon includes the superalloy.

12. The turbomachine part of claim 10, further comprising a braze material between a least a portion of the outwardly threaded body and the inwardly threaded opening.

13. The turbomachine part of claim 10, further comprising a braze material extending along an outward-facing junction between outwardly threaded body and the inwardly threaded opening.