Oxidation and wear resistant brazed coating
AssigneeGE Infrastructure Technology LLC
InventorsSurinder Singh Pabla, Srikanth C. Kottilingam, David Vincent Bucci, Biju Dasan
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Abstract
A method includes applying a material coating to a surface of a machine component, wherein the material coating is formed from a combination of a hardfacing material, aluminum-containing particles, and a braze material. The method also includes thermally treating the material coating at a temperature to generate an oxide layer comprising aluminum from the aluminum-containing particles, wherein the oxide layer is configured to reduce oxidation of the hardfacing material, and the braze material is configured to facilitate binding between the material coating and the surface of the machine component.
Claims20
A machine component comprising a material coating applied to a surface of the machine component, wherein the material coating comprises:
- a first layer comprising a first plurality of phases of a hardfacing material and a second plurality of phases of a braze material;
- and
- a second layer disposed on top of the first layer and comprising a third plurality of phases of an aluminum-containing material, wherein the aluminum-containing material is configured to oxidize to produce a self-limiting oxide layer having a thickness of 5 microns or less, wherein the self-limiting oxide layer is configured to reduce beta depletion of the hardfacing material, and wherein the braze material is configured to couple the first layer and the second layer to the surface of the machine component.
A machine component comprises a material coating, the material coating comprising:
- a first layer comprising a hardfacing material, an aluminum-containing material, and a nickel-based braze material, wherein the nickel-based braze material is configured to couple the hardfacing material and the aluminum-containing material with a surface of the machine component in response to heating to a brazing temperature;
- and
- a second layer formed by heat treatment of the first layer to precipitate a plurality of crystalline intermetallic phases from the aluminum-containing material, wherein the second layer is a self-limiting oxide layer.
A machine component comprising a material coating applied to a surface of the machine component, wherein the material coating comprises:
- a first layer comprising a first plurality of phases of a hardfacing material and an aluminum-containing material, and a second plurality of phases of a braze material, wherein the first layer is configured to be pre-heat treated to precipitate a plurality of crystalline intermetallic phases, and wherein the braze material is configured to couple the first layer to the surface of the machine component;
- and
- a second layer, wherein the second layer is an oxide layer formed from the crystalline intermetallic phases and oxidation of the aluminum-containing material.
Dependencies are inferred from the claim text.