Manufactured article and method

Patent metadata

Field	Value
Publication number	US-10174414-B2
Application number	US-201715434750-A
Country	US
Kind code	B2
Filing date	Feb 16, 2017
Priority date	Feb 16, 2017
Publication date	Jan 8, 2019
Grant date	Jan 8, 2019

Abstract

Manufactured articles, and methods of manufacturing enhanced surface smoothed components and articles. More particularly, surface smoothed components and articles, such as combustor components of turbine engines, having surface treatment conferring reduced roughness for enhanced performance and reduced wear related reduction in part life.

First claim

What is claimed is:

1. A manufactured article, comprising:
an additively manufactured component having sequentially joined layers of metallic powder, and
a braze film disposed on a surface of the additively manufactured component having the sequentially joined layers of metallic powder, the braze film having a contiguous thickness above the additively manufactured component of about 0.01 mm to about 1.0 mm;
wherein the braze film includes a surface roughness less than the surface the braze film is disposed on, and forms a finished surface of the manufactured article.

2. The article according to claim 1 , wherein the additively manufactured component comprises a metallic material selected from the group consisting of nickel-based superalloy, cobalt-based superalloy, iron-based superalloy, and combinations thereof.

3. The article according to claim 1 , further comprising at least one additional layer adjacent to the braze film, the at least one additional layer being selected from the group consisting of corrosion resistant alloys, abrasion resistant alloys, and combinations thereof.

4. The article according to claim 1 , wherein the braze film has a thickness from about 0.025 mm to about 0.635 mm.

5. The article according to claim 4 , wherein the braze film has a thickness of about 0.05 mm.

6. The article according to claim 1 , wherein the thickness of the braze film varies inversely across the surface relative to a surface variation of the surface, varying in thickness by about 5 μm to about 50 μm.

7. A method for fabricating a manufactured article, comprising the steps of:
forming an additively manufactured component having sequentially joined layers of metallic powder by an additive manufacturing process; and
applying a braze film to a surface of the additively manufactured component having the sequentially joined layers of metallic powder, the braze film having a contiguous thickness above the additively manufactured component of about 0.01 mm to about 1.0 mm.
wherein the braze film includes a surface roughness less than the surface the braze film is disposed on, and forms a finished surface of the manufactured article.

8. The method for fabricating the manufactured article according to claim 7 , wherein the additive manufacturing technique is selected from the group consisting of direct metal laser sintering, selective laser sintering, selective laser melting, electron beam melting, and combinations thereof.

9. The method for fabricating the manufactured article according to claim 8 , wherein the additive manufacturing technique includes direct metal laser sintering.

10. The method for fabricating the manufactured article according to claim 7 , wherein applying the braze film includes applying a braze material followed by vacuum brazing.

11. The method for fabricating the manufactured article according to claim 7 , wherein applying the braze film includes at least partially filling at least one crack disposed in the surface.

12. The article according to claim 1 , wherein the surface is an entire surface of the additively manufactured component.

13. The article according to claim 1 , wherein the surface includes at least one of an internal surface of the additively manufactured component and an external surface of the additively manufactured component.

14. The article according to claim 13 , wherein the surface includes the internal surface of the additively manufactured component.

15. The article according to claim 13 , wherein the surface includes both the internal surface of the additively manufactured component and the external surface of the additively manufactured component.

16. The article according to claim 1 , wherein the additively manufactured component is a gas turbine component or a steam turbine component.

17. The article according to claim 16 , wherein the gas turbine component or steam turbine component is selected from the group consisting of a combustor, a combustion liner, a combustion flex tip, a transition piece, a hot gas path component, a shroud, a bucket, a nozzle, a seal, and combinations thereof.

18. The article according to claim 1 , wherein the surface includes a micro-channel surface, a nozzle bar surface, a micromixer plenum surface, a micromixer tube assembly surface, a combustion flex tip surface, a microchannel cooled shroud surface, and combinations thereof.

19. The article according to claim 1 , wherein the braze film includes a composition selected from the group consisting of nickel-based superalloys, cobalt-based superalloys, a formula, by mass, of Ni 0.6715 Cr 0.14 B 0.0275 Co 0.1 Al 0.035 Ta 0.025 Y 0.001 , a formula, by mass, of Ni 0.71 Cr 0.0.19 Si 0.10 , and combinations thereof.

20. The article according to claim 1 , wherein the metallic powder includes a composition, by mass, selected from the group consisting of Co 0.70 Cr 0.27 Mo 0.03 , Ti balance Al 0.06 Va 0.04 , Co balance Cr 0.28 Mo 0.06 , Ni balance Cr 0.20 Co 0.10 Mo 0.08 Al 0.015 Ti 0.02 , Co 0.39-0.41 Cr 0.19-0.21 Ni 0.14-0.16 Fe 0.113-0.205 Mo 0.06-0.08 Mn 0.015-0.025 , Ni 0.50-0.55 Cr 0.17-0.21 Fe balance Mo 0.028-0.033 Nb 0.0475-0.055 Co 0.01 Mn 0.0035 Cu 0.002-0.008 Al 0.0065-0.0115 Ti 0.003 , Ni balance Cr 0.20-0.23 Fe 0.05 Mo 0.08-0.10 Nb+Ta 0.0315-0.0415 Co 0.01 Mn 0.005 Al 0.004 Ti 0.004 , and combinations thereof.

Assignees

• Gen Electric

Inventors

• Lin Dechao
• Bucci David Vincent
• Kottilingam Srikanth Chandrudu
• Cui Yan
• Schick David Edward
• Mcconnell Eric Eicher
• Singletary David

Classifications

• Y02P10/25

  Process efficiency · CPC title

• B23K35/3053

  Fe as the principal constituent · CPC title

• B23K35/308

  with Cr as next major constituent · CPC title

• B23K35/0233 Primary

  Sheets or foils (B23K35/0244 takes precedence) · CPC title

• B23K35/3086

  containing Ni or Mn · CPC title