# US 9,873,171 B2 · Method for holding brazing material during a brazing operation

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- Number: US 9,873,171 B2
- Document ID: US9873171B2
- Status: Granted
- Kind: B2
- Application number: 15/348,997
- Filed: 2016-11-11
- Published: 2017-03-02
- Granted: 2018-01-23
- Earliest claimed: 2014-06-17
- Assignees: Siemens Energy, Inc.
- Applicants: Siemens Energy, Inc.
- Inventors: Hang Li; Mark A. Garcia; Somesh J. Ghunakikar; William J. Lowe
- Web page: https://patentgrep.com/patent/US9873171B2

## CPC

- B23P 6/045: {of turbine components, e.g. moving or stationary blades, rotors, etc.}
- B23K 1/00: Soldering, e.g. brazing, or unsoldering (B23K3/00 takes precedence)
- B23K 1/0018: {Brazing of turbine parts}
- B23K 1/206: {Cleaning}
- B23K 3/087: {Soldering or brazing jigs, fixtures or clamping means}
- B23K 37/06: for positioning the molten material, e.g. confining it to a desired area
- B23P 6/007: {using only additive methods, e.g. build-up welding}
- B23P 6/04: Repairing fractures or cracked metal parts or products, e.g. castings
- F01D 5/005: {Repairing methods or devices}
- B23K 2101/001: {Turbines}
- F01D 9/02: Nozzles; Nozzle boxes; Stator blades; Guide conduits {, e.g. individual nozzles (nozzle boxes F01D9/047)}
- F05D 2220/32: in gas turbines
- F05D 2230/22: by sintering
- F05D 2230/80: Repairing, retrofitting or upgrading methods
- F05D 2300/175: Superalloys
- B23P: METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS (arrangements for copying or controlling B23Q)
- B23K: SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D)
- F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS

## Abstract

A method for holding a sintering filler material during a brazing/sintering operation for repairing a damaged area of a component wherein the component is in either a bonding face down position, bonding face vertical position or bonding face up position. The method includes providing a wire mesh and attaching the wire mesh to the component in a location corresponding to the damaged area. Further, the method includes forming a gap between the wire mesh and the component. Moreover, the sintering filler material may be inside the wire mesh or both inside and outside the wire mesh in order to secure the sintering filler material to the damaged area.

## Claims

### Claim 1

A method for holding a sintering filler material during a sintering operation for repairing a damaged area of a component wherein the component is in either a bonding face down position, bonding face vertical position or bonding face up position, comprising:
attaching a first quantity of sintering filler material to the damaged area;
positioning a wire mesh over the first quantity of sintering filler material;
attaching the wire mesh to a non-damaged surface of the component such that a gap portion of the wire mesh forms a gap between both the damaged and non-damaged areas of the component wherein the sintering filler material fills the gap and the wire mesh hinders creep of the sintering filler material; and
attaching a second quantity of sintering filler material onto the wire mesh.

### Claim 2 (depends on 1)

The method according to claim 1 further including cleaning the damaged area by performing a fluoride ion cleaning procedure for the component or localized grinding on the damaged area.

### Claim 3 (depends on 1)

The method according to claim 1 wherein the sintering filler material includes a multi-layer filler structure.

### Claim 4 (depends on 3)

The method according to claim 3 wherein the multi-layer filler structure includes a putty/putty two layer configuration.

### Claim 5 (depends on 3)

The method according to claim 3 wherein the multi-layer filler structure includes a plural layer putty-powder/slurry configuration.

### Claim 6 (depends on 1)

The method according to claim 1 wherein the wire mesh is attached to the component by a fusion welding method.

### Claim 7 (depends on 1)

The method according to claim 1 wherein the wire mesh is fabricated from a material which is metallurgically compatible with sintering filler material.