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AssigneeSiemens Energy, Inc.
InventorsGerald J. Bruck, Ahmed Kamel
Estimating the term…
Laser pre-processing to stabilize high-temperature coatings and surfaces. One method involves melting a surface of a metal substrate (2) with an energy beam (22) to form a melt pool (24), allowing the melt pool to cool and solidify into a melt-processed alloy layer (28) bonded to the metal substrate, and coating the melt-processed alloy layer with a protective alloy layer (4) to form a coated substrate. A flux composition (18) may also be deposited onto the surface of the metal substrate, such that the melt processing also forms a slag layer (30) at least partially covering the melt-processed alloy layer. A protective material (34) containing a carbon source may also be deposited onto the surface of the metal substrate, such that the melt processing forms a carbon-enriched melt-processed alloy layer (36) having a higher proportion of carbon than the metal substrate.
A coating method, comprising:
The method of claim 2, further comprising:
A method, comprising laser glazing a surface of a superalloy substrate and then coating a resulting amorphous surface with a platinum aluminide to form a first diffusion-coated superalloy exhibiting a greater resistance to formation of detrimental phase instabilities than a second diffusion-coated superalloy formed by coating the superalloy substrate directly with the platinum aluminide without performing the laser glazing.
Dependencies are inferred from the claim text.