Electroformed nickel-chromium alloy

a nickel-chromium alloy and electro-forming technology, applied in the field of electro-forming nickel-chromium alloys, can solve the problems of poor oxidation resistance, poor high temperature creep resistance of nickel, and the failure of conventional plating chemistry to achieve the formation of ni-cr alloys, etc., and achieve the effect of increasing the oxidation resistance of nickel-based alloys

Active Publication Date: 2019-03-07
RTX CORP
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  • Application Information

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Benefits of technology

[0007]According to an aspect of the present disclosure, an electroformed nickel-chromium (Ni—Cr) alloy suitable for making turbine engine components is disclosed. The electroformed Ni—Cr alloy comprises from 2 to 50 wt % chromium balanced by nickel, wherein the electroformed Ni—Cr alloy is thicker than 10 μm. The addition of chromium increases the oxidation resistance of the nickel based alloys.

Problems solved by technology

Nickel has excellent high temperature creep resistance, but poor oxidation resistance.
Typically, electrodeposition in the conventional plating chemistry has not been successful in forming Ni—Cr alloys with high chromium content (>8% wt., 20% wt. preferred) that is substantially thicker than 10 μm.

Method used

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Embodiment Construction

[0017]Electroforming is a metal forming process that forms self-supporting metal parts or components through electrodeposition. Electroforming a Ni—Cr alloy is a cost-effective and environmentally friendly method to make some high temperature-resistant turbine engine components with complex geometries and tighter tolerance.

[0018]According to an aspect of the present disclosure, an electroformed nickel-chromium (Ni—Cr) alloy for use as a turbine component is disclosed. The Ni—Cr alloy comprises from 2 to 50 wt % chromium and the balance nickel, and can be made thicker than at least 10 μm to form self-supporting turbine components. The Figure illustrates a plating bath containing an electrolyte solution for electroforming a Ni—Cr alloy according to an aspect of the present invention.

[0019]FIG. 1 illustrates a plating bath filled with an electrolytic solution for electroforming a Ni—Cr alloy according to an embodiment of the present disclosure Referring now to FIG. 1, there is provided...

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Abstract

An article comprising a turbine component formed of a nickel-chromium (Ni—Cr) alloy including from 2 to 50 wt % chromium balanced by nickel is disclosed. The Ni—Cr alloy is thicker than at least 125 μm to make a self-supporting turbine component, and the turbine component includes a rotor blade, a stator, or a vane. The Ni—Cr alloy is electroformed on a mandrel by providing an external supply of current to an anode and a cathode in a plating bath containing a solvent, a surfactant, and an ionic liquid including choline chloride, nickel chloride, and chromium chloride.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority to U.S. Provisional Application No. 61 / 914,548 filed on Dec. 11, 2013 and titled Electroformed Nickel-Chromium Alloy, the disclosure of which is hereby incorporated by reference in its entirety.FIELD OF USE[0002]The present disclosure relates to an electroformed nickel-chromium (Ni—Cr) alloy suitable for making a turbine component intended to operate in hostile environments. The present disclosure also relates to processes for the production of a thick electroformed Ni—Cr alloy component.BACKGROUND[0003]High and low pressure turbine components including rotor blades, vanes, and stators are generally made of nickel based alloys to stand hostile environments including high temperature. Electroformed Ni has been used in non-high temperature applications. Nickel has excellent high temperature creep resistance, but poor oxidation resistance. Thus, the addition of chromia or alumina formers to increase the oxida...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G01V1/00G01S19/14
CPCG01V1/003G01S19/14C22C38/40C22C19/05C25D3/665C25D3/562F01D5/28G01V1/26F05D2300/132F05D2300/17C25D1/00C22C38/18C22C38/58C25D3/56C25D3/66
Inventor CHEN, LEIWEERS, TIMOTHY A.
Owner RTX CORP
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