Repair of superalloy component
AssigneeSiemens Energy, Inc.
InventorsKazim Ozbaysal, Ahmed Kamel, Dhafer Jouini
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Abstract
A method of repairing a superalloy component (22) wherein a section (24) of the component containing a plurality of service-induced cracks (18, 20) is removed, then a replacement section (26) of superalloy material is installed with a structural braze joint (28) containing no boron or silicon. The replacement section may have a textured surface ((38) to enhance bonding with an overlying thermal barrier coating (42). The replacement section may be pre-formed to standardized dimensions in expectation of a typical service-induced crack pattern, and the removed section excavated accordingly. The interface between the replacement section and the component may be shaped to provide a mechanical interlock there between.
Claims12
A method comprising:
- removing a section of a component comprising a superalloy material;
- and
- installing a replacement section comprising a superalloy material in place of the removed section using a braze material containing no boron or silicon comprising a composition by weight percent of:
- Nickel
- 55-65,
- Titanium
- 15-25, and
- Chromium
- 15-25.
A method comprising:
- removing a section of a component comprising a superalloy material;
- and
- installing a replacement section using a braze material comprising the following composition by weight percent:
- Chromium
- 12-16,
- Titanium
- 13-16,
- Aluminum
- 0-2,
- Cobalt
- 2-4,
- Tungsten
- 3-5,
- Manganese
- 0-2,
- Tantalum
- 0-2, and
- Nickel
- balance.
A method comprising:
- evaluating a component comprising a superalloy material to identify a region of the component subject to service-induced defects;
- removing material from the region of the component;
- preparing a replacement section to replace the removed material, the replacement section comprising at least one of the group of:
- a different superalloy material than the removed material;
- and a different geometry than the removed material;
- and
- installing the replacement section into the component in place of the removed material using a braze material containing no boron or silicon comprising a composition by weight percent of:
- Nickel
- 55-65,
- Titanium
- 15-25, and
- Chromium
- 15-25.
Dependencies are inferred from the claim text.