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US 7,744,709 B2Granted
Welding repair method for full hoop structures
AssigneeUnited Technologies Corporation
InventorJames A. Dierberger
Life of this patent
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Abstract
A unique heat treat method for relieving stresses caused by a repairing weld joint in a full hoop part heat treats locally, at the location of the weld joint, and at a diametrically opposed location. By providing the diametrically opposed heat treat location, the present invention relieves stresses caused by the weld joint, without creating any additional residual stress in the weld joint.
Claims13
A method of treating a full hoop part comprising the steps of;
- (1) identifying a defect in a part, said part extending for 360° about an axial center line;
- (2) performing a weld treatment on said defect to correct said defect;
- and
- (3) performing heat treatment at a first band associated with said weld treatment, and at a second band, said second band being selected to be spaced about said axial center line from said first band, and said second band also being spaced from a location of said weld treatment.
1 more element
Dependencies are inferred from the claim text.