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US 12,663,014 B1Granted
Bi-metal impeller rotor
AssigneePratt & Whitney Canada Corp.
InventorTibor Urac
Life of this patent
Estimating the term…
Abstract
A method of manufacturing an impeller for a compressor section of a gas turbine engine, comprises forging a dual alloy workpiece having an inner portion welded to an outer portion along a conical weld line. The forging includes deforming the conical weld line to provide a non-linear interface between the inner portion and the outer portion.
Claims13
A method of manufacturing a dual alloy impeller for a compressor section of an aircraft engine, the method comprising:
- obtaining a first workpiece of a first metal alloy;
- obtaining a second workpiece of a second metal alloy, the second workpiece defining a cavity for receiving the first workpiece in a complementary fashion, the second metal alloy being more creep resistant than the first metal alloy, the first metal alloy being more cold dwell resistant than the second metal alloy;
- inserting the first workpiece into the cavity of the second workpiece and joining the first workpiece to the second workpiece to create a pre-joined dual alloy workpiece;
- and then
- forging the pre-joined dual alloy workpiece, wherein the forging the pre-joined dual alloy workpiece comprises using flow maps from forge modelling to create a non-linear interface between the first metal alloy and the second metal alloy.
2 more elements
A method of manufacturing an impeller for a compressor section of a gas turbine engine, the method comprising:
- forging a dual alloy workpiece having an inner portion welded to an outer portion along a conical weld line, the forging including deforming the conical weld line to provide a non-linear interface between the inner portion and the outer portion;
- wherein the forging the dual alloy workpiece comprises using flow maps from forge modelling to create the non-linear interface.
Dependencies are inferred from the claim text.