Superalloy repair welding using multiple alloy powders
AssigneeSiemens Energy, Inc.
InventorsZheng Chen, Ovidiu Timotin
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Abstract
A method of welding a gas turbine engine substrate composed of a gamma prime precipitation strengthened nickel based superalloy, including the steps of: applying weld beads on the substrate to form a continuous layer the thickness of the weld beads; using a filler material made of a first material exhibiting comparable strength and ductility as the substrate, and a second material exhibiting greater ductility than the substrate; and creating crack propagation mitigating regions within the continuous layer by increasing the percentage of the second material in the crack propagation mitigating regions over the percentage of the second material in the remainder of the continuous layer.
Claims27
A method of welding a gas turbine engine substrate composed of a gamma prime precipitation strengthened nickel based superalloy, the method comprising:
- applying weld beads to a surface of the substrate to form a continuous layer of weld beads, where each weld bead of the continuous layer touches the surface of the substrate, using a filler material comprising a first material exhibiting comparable strength and ductility as the substrate and a second material exhibiting greater ductility than the substrate;
- and
- creating a plurality of crack propagation mitigating regions within the continuous layer, each crack propagation region defined by an increased percentage of the second material when compared to a percentage of the second material in a remainder of the continuous layer.
Dependencies are inferred from the claim text.