Turbine rotor fabrication using cold spraying
AssigneeGeneral Electric Company
InventorsEklavya CALLA, Surinder Pabla, Raymond Goetze
Life of this patent
Estimating the term…
Abstract
A method of manufacturing a rotor includes: (a) providing a core shaft; (b) cold spraying alloy powder particles onto the core shaft; (c) controlling the cold spraying to form sections at least of different shape along the core shaft to thereby form a near-net shape rotor; and (d) heat treating the near-net shape rotor to relieve stresses and to form diffusion bonding across interfaces between individual powder particles and the core shaft, and finish-shaping said near-net shape rotor.
Claims20
A method of manufacturing a rotor comprising:
- (a) providing a core shaft;
- (b) cold spraying alloy powder particles onto said core shaft;
- (c) controlling the cold spraying to form sections of different shape along the core shaft to thereby form a near-net shape rotor;
- and
- (d) treating said near-net shape rotor to relieve stresses and to form diffusion bonding across interfaces between individual powder particles and the core shaft.
A method of repairing a damaged rotor comprising:
- (a) preparing a locally damaged portion of the rotor;
- (b) cold spraying alloy powder particles onto said locally damaged portion;
- (c) controlling the cold spraying in step (b) to restore the locally damaged portion to form a repaired portion having substantially the same properties and shape as originally manufactured;
- and
- (d) heat treating at least the repaired portion.
A method of manufacturing a rotor comprising:
- (a) providing a core shaft;
- (b) cold spraying alloy powder particles onto said core shaft;
- (c) controlling the cold spraying to form core shaft sections of different shape along a length dimension of the core shaft;
- (d) cold spraying to form one or more rotor discs adapted for assembly on said core shaft;
- (e) fixing said one or more rotor disks on said rotor to form a near-net shape rotor;
- (f) heat treating said near-net shape rotor to relieve stresses and to form diffusion bonding across interfaces between individual powder particles and the core shaft;
- and
- (g) finish-shaping said near-net shape rotor.
Dependencies are inferred from the claim text.