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US 7,351,450 B2Granted
Correcting defective kinetically sprayed surfaces
AssigneeDelphi Technologies, Inc.
InventorsBrian K Fuller, Alaa A. Elmoursi, Kenneth M Rahmoeller
Life of this patent
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Abstract
Disclosed is a method for repairing defects in kinetically sprayed surfaces. The typical defects comprise isolated or connected conical shaped holes in the kinetic spray coating. The repair involves thermally spraying a molten material into the defective area to fill in the cone followed by continued kinetic spraying to complete the coating.
Claims13
A method for repairing a defect in a kinetically sprayed surface comprising the steps of:
- providing a kinetically sprayed surface having a thickness of at least 5 millimeters formed from particles maintained at a temperature below their melting temperature during kinetic spraying, the kinetically sprayed surface having a defect caused by said kinetic spraying;
- and
- applying a repair coating to the defect by thermally spraying a molten material on the defect by a thermal spray process selected from the group consisting of a High Velocity Oxy-Fuel combustion thermal spray process, a wire arc thermal spray process, a vacuum plasma thermal spray process, a flame spray thermal process, or a radio frequency plasma thermal spray process thereby filling the defect and repairing the defect.
A method for repairing a defect in a kinetically sprayed surface comprising the steps of:
- a) providing a kinetically sprayed surface having a thickness of at least 5 millimeters formed from particles maintained at a temperature below their melting temperature during kinetic spraying, the kinetically sprayed surface having a defect caused by said kinetic spraying;
- b) applying a repair coating to the defect by thermally spraying a molten material on the defect by a thermal spray process selected from the group consisting of a High Velocity Oxy-Fuel combustion thermal spray process, a wire arc thermal spray process, a vacuum plasma thermal spray process, a flame spray thermal process, or a radio frequency plasma thermal spray process thereby filling the defect and repairing the defect;
- and
- c) applying an additional kinetically sprayed surface over the repaired defect.
1 more element
Dependencies are inferred from the claim text.