Hybrid laser plus submerged arc or electroslag cladding of superalloys
AssigneeSiemens Energy, Inc.
InventorsGerald J. Bruck, Ahmed Kamel
Life of this patent
Estimating the term…
Abstract
A method for cladding of superalloy materials. A layer of powder (14) disposed over a superalloy substrate (12) is heated with an energy beam (16) to form a layer of superalloy cladding (10) and an overlying layer of slag (18). A filler material (44) of nickel, nickel-chromium or nickel-chromium-cobalt wire or strip is also added to the melt pool to combine with the melted powder via a submerged arc or electroslag heating process to give the superalloy cladding the composition of a desired superalloy material. The layer of powder includes a layer of powdered flux material (22) over a layer of powdered metal (20), or the flux and metal powders may be mixed together (36).
Claims20
A method comprising:
- covering a portion of a surface of a superalloy substrate material with a powder comprising powdered flux material and powdered metal material;
- applying an energy beam to the powder to create a melt pool and floating slag;
- melting a filler material into the melt pool with submerged arc or electroslag heating;
- wherein the filler material and powder are selected such that the melt pool forms a composition of a desired superalloy material;
- and
- allowing the melt pool to cool and solidify under the slag to form a clad surface of the desired superalloy material.
A method comprising:
- selecting a base alloy feed material, a powdered alloying material and a powdered flux material such that a combined melt of the materials will produce an alloy composition of a desired superalloy material;
- applying a layer of powder to a superalloy substrate, the layer of powder comprising the powdered alloying material and the powdered flux material;
- and
- introducing the base alloy feed material with a submerged arc or electroslag welding process while traversing an energy beam across the layer of powder to form a clad layer of the desired superalloy material covered by a layer of slag on the superalloy substrate.
A method comprising:
- applying heat via an energy beam during a submerged arc or electroslag process to simultaneously melt a powder material and a wire or strip feed material to form a composition of a desired superalloy material in a melt pool under a floating slag layer;
- allowing the melt pool to cool and solidify under the slag layer;
- and
- removing the slag layer to reveal a clad layer of the desired superalloy material.
Dependencies are inferred from the claim text.