Turbomachine component with an erosion and corrosion resistant coating system and method for manufacturing such a component

Patent metadata

Field	Value
Publication number	US-10041360-B2
Application number	US-201414177766-A
Country	US
Kind code	B2
Filing date	Feb 11, 2014
Priority date	Feb 15, 2013
Publication date	Aug 7, 2018
Grant date	Aug 7, 2018

Abstract

A turbomachine component of a stationary turbomachine includes a substrate made of high alloyed 10% to 18% chromium steels or titanium alloys or nickel base alloys or cobalt base alloys with a substrate surface and an erosion and corrosion resistant coating system. The coating system includes a first layer, which is deposited on the substrate surface of the turbomachine component and acts as a corrosion resistant layer and a second layer. The second layer is deposited on the first layer and acts as an erosion resistant layer, wherein the first layer is a Zr single layer and the second layer is a W/WC multilayer.

First claim

The invention claimed is:

1. A turbomachine component of a stationary turbomachine, comprising:
a substrate made of high alloyed 10% to 18% chromium steels or titanium alloys or nickel base alloys or cobalt base alloys with a substrate surface; and
an erosion and corrosion resistant coating system including:
a first layer deposited on the substrate surface of said turbomachine component as a corrosion resistant layer; and
a second layer deposited on said first layer as an erosion resistant layer, wherein said first layer is a single layer consisting of Zr having a thickness of 3-10 μm and said second layer consists of a W/WC multilayer.

2. The turbomachine component as claimed in claim 1 , wherein said component is a compressor blade or vane of a gas turbine, comprising an airfoil with a leading edge and a trailing edge, and that said second layer is provided at the leading edge.

3. The turbomachine component as claimed in claim 1 , wherein said first layer has a thickness, which is smaller than the thickness of said second layer.

4. The turbomachine component as claimed in claim 3 , wherein said first layer has a thickness of 3-10 μm, and that the second layer has a thickness of 15-23 μm.

5. The turbomachine component as claimed in claim 1 , wherein said second layer comprises 10 or more alternating sublayers of W and WC.

6. The turbomachine component as claimed in claim 5 , wherein said second layer comprises 10 sublayers of W and 10 sublayers of WC with 0.75 to 1.25 μm thickness each.

7. A method for manufacturing a turbomachine component, comprising:
a) providing the component with a substrate made of high alloyed 10% to 18% chromium steels or titanium alloys or nickel base alloys or cobalt base alloys having a substrate surface;
b) depositing on said substrate surface said first, corrosion resistant layer, wherein the layer is deposited as a single layer coating consisting of Zr having a thickness of 3-10 μm,
c) depositing on said first corrosion resistant layer said second, erosion resistant layer, wherein the second layer consists of a W/WC multilayer coating, thereby using said first layer as a bond coat.

8. The method as claimed in claim 7 , wherein W and WC single layers or sublayers of equal thickness are alternating deposited until an overall thickness of the multilayer of 15-23 μm is achieved.

9. The method as claimed in claim 7 , wherein the deposition of each of the first layer and the second layer is done by magnetron sputtering.

10. The method as claimed in claim 7 , wherein the deposition of each of the first layer and the second layer is done by gas flow sputtering based on a hollow cathode glow discharge in combination with a directed gas flow.

Assignees

• Ansaldo Energia Switzerland AG

Inventors

• Klam Hans-Joachim
• Ortner Kai
• Ulrichsohn Björn

Classifications

• C23C14/228

  Gas flow assisted PVD deposition · CPC title

• C23C28/322

  only coatings of metal elements only · CPC title

• C23C28/00

  Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D · CPC title

• C23C28/42

  characterized by the composition of the alternating layers · CPC title

• C23C14/165

  by cathodic sputtering · CPC title