Electrodeposited nickel-chromium alloy

Patent metadata

Field	Value
Publication number	US-2016312627-A1
Application number	US-201415103077-A
Country	US
Kind code	A1
Filing date	Dec 3, 2014
Priority date	Dec 10, 2013
Publication date	Oct 27, 2016
Grant date	—

Abstract

A nickel-chromium (Ni—Cr) alloy and a method for electrodepositing the Ni—Cr alloy on a turbine engine component for dimensionally restoring the engine component are described. The engine component is restored by re-building wall thickness with the Ni—Cr alloy including from 2 to 50 wt % chromium balanced with nickel. The turbine component coated with the Ni—Cr alloy is heat-treated at a high temperature to homogenize composition of the alloy to mimic the base alloy and to restore materials lost during repair of the turbine component.

First claim

What is claimed is:

1 . A coated article, comprising:
a turbine component; and a Ni—Cr alloy applied on a surface of the turbine component, wherein the Ni—Cr alloy contains primarily from 2 to 50 wt % chromium balanced by nickel, and wherein the Ni—Cr alloy is heat-treated to homogenize composition of the alloy and restore materials lost during repair of the turbine component.

2 . The coated article of claim 1 , wherein the Ni—Cr alloy comprises from 8 to 20 wt % chromium balanced by nickel.

3 . The coated article of claim 1 , wherein the Ni—Cr alloy is thicker than 2 mils (0.05 mm).

4 . The coated article of claim 1 , wherein the Ni—Cr alloy is thicker than 5 mils (0.125 mm).

5 . The coated article of claim 1 , wherein the turbine component is a rotor blade, a stator, or a vane.

6 . A method for electrodepositing a nickel-chromium (Ni—Cr) alloy plated on a turbine component, the method comprising:
pre-treating the turbine component;
providing a plating bath containing a solvent, a surfactant, and an ionic liquid including choline chloride, nickel chloride, and chromium chloride, wherein a molar ratio of the choline chloride, combined chromium chloride, and nickel chloride ranges from 0.5 to 3.5, and the solvent comprises from 5 to 80 vol. % relative to a volume of a mixture of the choline chloride and metal chlorides including both nickel chloride and chromium chloride;
electrodepositing the Ni—Cr alloy onto a metallic substrate by providing an external supply of current to an anode and a cathode; and
heat-treating the turbine component coated with Ni—Cr alloy to re-build wall thickness and restore materials lost during repair of the turbine component.

7 . The method according to claim 6 , wherein the anode is an insoluble anode.

8 . The method according to claim 6 , wherein the anode is a Ni—Cr alloy anode.

9 . The method according to claim 6 , wherein the anode includes is a Ni anode and a Cr anode.

10 . The method according to claim 6 , wherein the current is a direct current.

11 . The method according to claim 6 , wherein the current is an alternating current.

12 . The method according to claim 6 , wherein the solvent is a polar protic solvent.

13 . The method according to claim 6 , wherein the solvent is a polar aprotic solvent.

14 . The method according to claim 6 , wherein the solvent is chosen from one or more of formic acid, citric acid, isopropanol (IPA), water, acetic acid, glycine (amino-acetic acid), and ethylene glycol.

15 . The method according to claim 6 , wherein the surfactant is an anionic, a cationic, or an amphoteric surfactant.

16 . The method according to claim 6 , wherein the surfactant is sodium dodecyl surfate, fluorosurfactants, cetyl trimethylammonium bromide (CTAB), or cetyl trimethylammonium chloride (CTAC).

17 . The method according to claim 6 , wherein the Ni—Cr alloy comprises from 8 to 20 wt % chromium balanced by nickel.

18 . The method according to claim 6 , wherein the Ni—Cr alloy is thicker than 2 mils (0.05 mm).

19 . The method according to claim 6 , wherein the Ni—Cr alloy is thicker than 5 mils (0.125 mm).

20 . The method according to claim 6 , wherein the turbine component is a rotor blade, a stator, or a vane.

Assignees

• United Technologies Corp

Inventors

• Chen Lei
• Yang Zhiwei
• Brindley William J
• Kinstler Monika D
• Saxton Bruce R

Classifications

• F01D25/005

  Selecting particular materials · CPC title

• F01D9/02

  Nozzles; Nozzle boxes; Stator blades; Guide conduits {, e.g. individual nozzles (nozzle boxes F01D9/047)} · CPC title

• C25D5/50

  by heat-treatment · CPC title

• F05D2230/90

  Coating; Surface treatment · CPC title

• C25D5/40

  Nickel; Chromium · CPC title