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US 6,258,402 B1Granted
Method for repairing spray-formed steel tooling
OwnerNakhleh Hussary, Paul Earl Pergande +1inventors
InventorsNakhleh Hussary, Paul Earl Pergande, Robert Corbly McCune
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Abstract
A machine tool or die that is fabricated from thermally spray-formed steel is easily repaired by cleaning, roughing and covering the surface to be repaired by a cold-spray layer of metal and then forming a weldment by conventional electric welding processes. The repaired surface is then finished by conventional machining, grinding and polishing and then the tool is put back into service.
Claims10
The method for repairing thermal spray-formed tooling comprises the steps of:
- cleaning the surface area to be repaired of dirt and impurities;
- preparing the surface area to be repaired to accept spray coatings;
- cold-spraying an initial layer of low-carbon steel to a predetermined thickness on the spray-formed tooling on the surface area to be repaired and then
- depositing by an electric welding process a weldment on the cold-spray layer.
1 more element
Dependencies are inferred from the claim text.