Radiopaque protective fill for manufacture, repair, or remanufacture of cooled components

Patent metadata

Field	Value
Publication number	US-10041890-B2
Application number	US-201514817422-A
Country	US
Kind code	B2
Filing date	Aug 4, 2015
Priority date	Aug 4, 2015
Publication date	Aug 7, 2018
Grant date	Aug 7, 2018

Abstract

A method of manufacturing a core for casting a component can include manufacturing a core for at least partially forming an internal passage architecture of a component with a material including radiopaque particles. A method can include removing a material including radio opaque particles from an internal passage architecture of a component; and inspecting the component via radiographic imaging at gamma/X-ray wavelengths to detect residual material. A core for use in casting an internal passage architecture of a component can include a material with radiopaque particles dispersed therein.

First claim

What is claimed is:

1. A method of manufacturing a core for casting a component, comprising:
manufacturing a core for at least partially forming an internal passage architecture of a component with a material including radiopaque particles; and
inspecting the component via radiographic imaging at gamma/X-ray wavelengths to detect residual material subsequent to manufacture of the component.

2. The method as recited in claim 1 , wherein the radiopaque particles include refractory metal oxide particles.

3. The method as recited in claim 1 , wherein the radiopaque particles include at least one of Molybdenum Dioxide (MoO2), Zirconium Dioxide (ZrO2), tungsten trioxide, tantalum pentoxide, molybdenum silicide, tungsten silicide, elemental molybdenum, tantalum, chromium and tungsten.

4. The method as recited in claim 1 , further comprising attaching a Refractory Metal Core to the core.

5. The method as recited in claim 1 , wherein the core is produced by a molding process.

6. The method as recited in claim 1 , wherein the core is transfer molded.

7. The method as recited in claim 1 , wherein the core is injection molded.

8. The method as recited in claim 1 , wherein the core is additively manufactured.

9. The method as recited in claim 1 , further comprising forming an outer shell mold that contains the core, wherein a cavity is formed by the outer shell mold and the core, the cavity defining the component.

10. A method, comprising:
removing a salt-based protective fill material including radiopaque particles from an internal passage architecture of a component; and
inspecting the component via radiographic imaging at gamma/X-ray wavelengths to detect residual salt-based protective fill material through identification of the radiopaque particles.

11. The method as recited in claim 10 , wherein the radiopaque particles include refractory metal oxide particles.

12. The method as recited in claim 10 , wherein the radiopaque particles include at least one of Molybdenum Dioxide (MoO2), Zirconium Dioxide (ZrO2), tungsten trioxide, tantalum pentoxide, molybdenum silicide, tungsten silicide, elemental molybdenum, tantalum, chromium and tungsten.

13. The method as recited in claim 10 , further comprising filling at least one of a multiple of cooling holes formed by the internal passage architecture with the material.

14. The method as recited in claim 13 , further comprising removing the material from the at least one of the multiple of cooling holes formed by the internal passage architecture with a manual operation.

15. The method as recited in claim 14 , further comprising filling the at least one of the multiple of cooling holes formed by the internal passage architecture with an Oxidation Resistant Braze (ORB).

16. The method as recited in claim 15 , further comprising forming a cooling hole through the Oxidation Resistant Braze (ORB) subsequent to the filling the at least one of the multiple of cooling holes formed by the internal passage architecture with an Oxidation Resistant Braze (ORB).

17. A core for use in casting an internal passage architecture of a component, comprising:
a salt-based protective fill material with radiopaque particles dispersed therein, said radiopaque particles detectable via radiographic imaging at gamma/X-ray wavelengths.

18. The core as recited in claim 17 , wherein the radiopaque particles include at least one of Molybdenum Dioxide (MoO2), Zirconium Dioxide (ZrO2), tungsten trioxide, tantalum pentoxide, molybdenum silicide, tungsten silicide, elemental molybdenum, tantalum, chromium and tungsten.

19. The core as recited in claim 17 , wherein the radiopaque particles include refractory metal oxide particles.

20. The core as recited in claim 1 , wherein the radiopaque particles are of a particle size between 0.0001 inches to 0.003 inches (0.0025 mm-0.076 mm) in diameter.

21. The core as recited in claim 1 , wherein the core is manufactured of a material that is an alumina.

22. The core as recited in claim 1 , wherein the core is manufactured of a material that is a silica-base ceramic fill.

23. The core as recited in claim 1 , wherein the core is manufactured of a material that is a salt-based protective fill.

24. The core as recited in claim 23 , wherein the salt-based protective fill is a water soluble material composed of a salt such as magnesium sulfate, tribasic potassium phosphate, or other such salt-based composition.

25. The core as recited in claim 23 , wherein the salt-based protective fill is a water soluble material composed of a mixture of about 50 mol % of Na2CO3, about 20 mol % of NaCl, and about 30 mol % of KCl.

26. The core as recited in claim 23 , wherein the salt-based protective fill has an upper temperature limit that is tuned by selection of the salt.

27. The core as recited in claim 26 , wherein the salt-based protective fill comprises magnesium sulfate that will not melt until 2055° F. (1124° C.) and tribasic potassium phosphate will not melt until 2516° F. (1380° C.).

Assignees

• United Technologies Corp

Inventors

• Auxier James Tilsley
• Castle Lea Kennard

Classifications

• B22C9/24

  for hollow articles · CPC title

• B22D46/00

  Controlling, supervising, not restricted to casting covered by a single main group, e.g. for safety reasons (controlling or regulating in general G05) · CPC title

• F05D2300/50

  Intrinsic material properties or characteristics · CPC title

• B23K2101/001

  Turbines · CPC title

• G01M15/14

  Testing gas-turbine engines or jet-propulsion engines · CPC title