Solid-state welding of coarse grain powder metallurgy nickel-based superalloys
AssigneeRaytheon Technologies Corporation
InventorsAshwin Sreekant Raghavan, Kenneth A. Frisk, Max A. Kaplan, Mario P. Bochiechio, Michael A. Czywczynski
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Abstract
A method for welding a first powder metallurgical (PM) part to a second powder metallurgical (PM) part includes: working a first face of the first PM part; working a first face of the second PM part; and friction welding the first face of the first part to the first face of the second part.
Claims19
A method for welding a first powder metallurgical (PM) part to a second powder metallurgical (PM) part, the method comprising:
- forming the first PM part and the second PM part by forging;
- machining of a first face of the first PM part and a first face of the second PM part;
- after the machining of the first face of the first PM part, working the first face of the first PM part;
- after the machining of the first face of the second PM part, working the first face of the second PM part;
- and
- friction welding the first face of the first PM part to the first face of the second PM part,
- wherein:
- the working of the first faces of the first PM part and second PM part comprises working selected from the group consisting of roller burnishing, laser shock peening, and low plasticity burnishing.
A method for welding a first powder metallurgical (PM) part to a second powder metallurgical (PM) part, the method comprising:
- forming the first PM part and the second PM part by forging;
- machining of a first face of the first PM part and a first face of the second PM part;
- after the machining of the first face of the first PM part, working the first face of the first PM part;
- after the machining of the first face of the second PM part, working the first face of the second PM part;
- and
- friction welding the first face of the first PM part to the first face of the second PM part, wherein:
- the working of the first faces of the first PM part and the second PM part is sufficient to achieve local compressive residual stress of −30 ksi (−207 MPa) or greater magnitude at 0.050 inch (1.3 mm) deep from the first faces of the first PM part and the second PM part.
Dependencies are inferred from the claim text.