Method for manufacturing a component of a rotating machine

Patent metadata

Field	Value
Publication number	US-11148200-B2
Application number	US-201615780711-A
Country	US
Kind code	B2
Filing date	Dec 1, 2016
Priority date	Dec 2, 2015
Publication date	Oct 19, 2021
Grant date	Oct 19, 2021

Abstract

A method for manufacturing a component of a rotating machine comprises the steps of forming a structural inner portion by additive manufacturing from a first material; covering the structural inner portion with a protective outer portion made of a second material; the first material has a melting point higher than a second material.

First claim

What we claim is:

1. A component for a rotating machine comprising:
a structural inner portion manufactured by additive manufacturing and made from a first material, the inner portion defined by a lattice structure comprising a plurality of cells, each cell formed by a repeating set of nodes and beams, where adjacent nodes are joined by beams;
a protective outer portion covering the structural inner portion and made of a second material, wherein the first material has a melting point higher than the second material and the component is a blade of a gas turbine.

2. The component according to claim 1 , wherein at least two mechanical properties of the inner portion are higher than that of the outer portion.

3. The component according to claim 1 , wherein the mechanical properties are tensile strength and creep resistance.

4. The component according to claim 1 , wherein said second material has a higher resistance to corrosion and oxidation than the first material at high temperatures.

5. The component according to claim 4 , wherein said high temperatures are higher than 1000° C.

6. The component according to claim 5 , wherein the outer portion is made by hot isostatic pressuring.

7. The component according to claim 1 , wherein the second material comprises a nickel aluminum alloy.

8. The component according to claim 1 , wherein the first material comprises a predominant weight of a refractory metal.

9. The component according to claim 8 , wherein the refractory metal comprises tungsten or a tungsten alloy or a molybdenum alloy.

10. The component according to claim 6 , wherein the structural inner portion is a vessel configured to receive a powder of the second material and withstand pressures reached during the hot isostatic pressuring.

11. The component according to claim 1 wherein the outer portion covers entirely the inner portion.

12. The component according to claim 1 , wherein the first material comprises a predominant weight of a eutectic metal.

13. The component according to claim 1 , wherein the first material is a silicide-based composite material and the second material comprises a nickel aluminum alloy.

14. The component according to claim 13 , wherein the silicide-based composite material comprises a silicide, Si3N4 and at least an oxide.

Assignees

• Nuovo Pignone Tecnologie Srl
• Baker Hughes A Ge Co Llc

Inventors

• Tozzi Pierluigi
• Giannozzi Massimo
• Giovannetti Iacopo
• Tognarelli Leonardo
• Dimatteo Antonella

Classifications

• B22F10/64

  by thermal means (control of energy beam parameters for post heating B22F10/364) · CPC title

• B22F10/28

  Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM] · CPC title

• B22F2998/10

  Processes characterised by the sequence of their steps · CPC title

• F05D2230/30

  with deposition of material · CPC title

• F01D5/288

  Protective coatings for blades · CPC title