Molten metal resistant composite coatings
AssigneeKennametal Inc.
InventorsMichael Knight, Cliff Garrigus, Hongbo Tian
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Abstract
Composite coating materials comprising a hard carbide phase and a metallic binder that are resistant to molten metals such as aluminum are disclosed. The hard carbide phase of the composite coatings may comprise tungsten carbide, and the metallic binder may comprise a nickel-based alloy. A thin oxide layer comprising oxides of the binder metal may be provided on the surface of the composite coating. The composite coatings exhibit desirable non-wetting behavior when exposed to molten metals.
Claims20
A molten metal resistant composite coating comprising:
- a hard carbide phase;
- and
- a metallic binder comprising Ni and Cr.
A tool capable of withstanding exposure to molten metal comprising:
- a substrate, and
- a composite coating over at least a portion of the substrate, wherein the composite coating comprises a hard carbide phase and a metal binder phase.
A method of coating a substrate comprising:
- depositing a composite coating on at least a portion of the substrate, wherein the composite coating comprises a base layer comprising a hard carbide phase and a metallic binder phase.
Dependencies are inferred from the claim text.