Pre-sintered preform braze reinforcement of pressure vessels

Patent metadata

Field	Value
Publication number	US-12447545-B2
Application number	US-202418664969-A
Country	US
Kind code	B2
Filing date	May 15, 2024
Priority date	Jan 3, 2020
Publication date	Oct 21, 2025
Grant date	Oct 21, 2025

Abstract

The disclosure describes assemblies, systems, and techniques for reinforcing complex geometries of pressure vessels using a pre-sintered preform (PSP) braze material that includes a low-melt powder and a high-melt powder. An example component includes a substrate comprising at least a portion of a pressure vessel. The substrate defines a contoured exterior surface of the pressure vessel. The component includes a pre-sintered preform (PSP) reinforcement formed on the surface of the substrate by brazing, wherein the PSP reinforcement comprises a low-melt powder and a high-melt powder.

First claim

What is claimed is:

1. A component comprising:
a substrate comprising at least a portion of a pressure vessel of a gas turbine engine or an outer combustion chamber of a gas turbine engine, wherein the substrate defines a contoured exterior surface; and
a pre-sintered preform (PSP) reinforcement formed over a welded seam on an undamaged surface of the substrate by brazing, wherein the PSP reinforcement comprises a low-melt powder and a high-melt powder, and wherein the PSP reinforcement defines a thickness within a range of from about 0.381 millimeters (mm) to about 25.2 mm.

2. The component of claim 1 , wherein the high-melt powder comprises a nickel-based alloy or an iron-based alloy.

3. The component of claim 1 , wherein the low-melt powder comprises at least one of silicon or boron.

4. The component of claim 1 , wherein a weight percent (wt. %) of the low-melt powder is within a range from about 20 wt. % to about 40 wt. %.

5. The component of claim 1 , wherein the reinforcement comprises between about 50 wt. % and about 90 wt. % Ni, up to 15 wt. % Cr, up to 10 wt. % Ta, up to 10 wt. % Co, up to 7 wt. % Al, up to 4 wt. % W, up to 2 wt. % Re, up to 1 wt. % Mo, up to 1 wt. % Hf, up to 0.5 wt. % Nb, up to 3 wt. % Si, and up to 3 wt. % B.

6. An assembly comprising:
a substrate comprising at least a portion of a pressure vessel of a gas turbine engine or an outer combustion chamber of a gas turbine engine;
a pre-sintered preform (PSP) reinforcement formed over a welded seam on an undamaged surface of the substrate, wherein the PSP reinforcement comprises a low-melt powder and a high-melt powder, and wherein the PSP reinforcement defines a thickness within a range of from about 0.381 millimeters (mm) to about 25.2 mm; and
a heat source configured to heat the PSP reinforcement to soften or melt at least one constituent metal or alloy of the low-melt powder,
wherein, during heating, the PSP reinforcement is configured to conform to a contour of the surface of the substrate.

7. The assembly of claim 6 further comprising means to compress the PSP reinforcement onto the surface of the substrate.

8. The assembly of claim 6 , wherein the high-melt powder comprises a nickel-based alloy or an iron-based alloy.

9. The assembly of claim 6 , wherein the low-melt powder comprises at least one of silicon or boron.

10. The component of claim 6 , wherein a weight percent (wt. %) of the low-melt powder is within a range from about 20 wt. % to about 40 wt. %.

11. The component of claim 6 , wherein the reinforcement comprises between about 50 wt. % and about 90 wt. % Ni, up to 15 wt. % Cr, up to 10 wt. % Ta, up to 10 wt. % Co, up to 7 wt. % Al, up to 4 wt. % W, up to 2 wt. % Re, up to 1 wt. % Mo, up to 1 wt. % Hf, up to 0.5 wt. % Nb, up to 3 wt. % Si, and up to 3 wt. % B.

Assignees

• Rolls Royce Corp

Inventors

• Henderkott Joseph Peter

Classifications

• B23K1/008

  Soldering within a furnace (B23K1/012 takes precedence) · CPC title

• C22C19/058

  without Mo and W · CPC title

• C22C19/057

  with the maximum Cr content being less 10% · CPC title

• C22C19/056

  with the maximum Cr content being at least 10% but less than 20% · CPC title

• C22C19/05

  with chromium · CPC title