Three-dimensional manufacturing methods and systems for turbine components

Patent metadata

Field	Value
Publication number	US-10029299-B2
Application number	US-201514794839-A
Country	US
Kind code	B2
Filing date	Jul 9, 2015
Priority date	Jul 9, 2015
Publication date	Jul 24, 2018
Grant date	Jul 24, 2018

Abstract

The present application provides a method of producing a component. The method may include the steps of creating a dissolvable ceramic material mold in an additive manufacturing process, casting a metallic material in the dissolvable ceramic material mold, creating the component, and dissolving the dissolvable ceramic material. The component may be a turbine component.

First claim

We claim:

1. A method of producing a component, comprising:
creating a dissolvable ceramic material mold in an additive manufacturing process comprising a binder jetting process in which a liquid binding agent is selectively deposited to join powder particles;
casting a metallic material in the dissolvable ceramic material mold;
creating the component; and
dissolving the dissolvable ceramic material mold with water.

2. The method of claim 1 , wherein the component comprises an airfoil with internal cooling channels.

3. The method of claim 1 , wherein the step of creating the dissolvable ceramic material mold comprises creating a dissolvable ceramic material core.

4. The method of claim 3 , wherein the step of casting the metallic material in the dissolvable ceramic material mold comprises casting the metallic material about the dissolvable ceramic material core.

5. The method of claim 3 , wherein the step of dissolving the dissolvable ceramic material mold with water comprises dissolving the dissolvable ceramic material core with water.

6. The method of claim 5 , wherein the step of dissolving the dissolvable ceramic material core comprises creating a cooling channel in the component.

7. The method of claim 1 , wherein the step of creating the dissolvable ceramic material mold comprises creating a dissolvable ceramic material combined core and mold.

8. The method of claim 7 , wherein the step of casting the metallic material in the dissolvable ceramic material mold comprises casting the metallic material about the dissolvable ceramic material combined core and mold.

9. The method of claim 7 , wherein the step of dissolving the dissolvable ceramic material mold with water comprises dissolving the dissolvable ceramic material combined core and mold with water.

10. The method of claim 9 , wherein the step of dissolving the dissolvable ceramic material combined core and mold comprises creating a cooling channel and a sidewall in the component.

11. The method of claim 7 , wherein the step of creating the dissolvable ceramic material combined core and mold comprises creating the core and the mold together in the additive manufacturing process.

12. The method of claim 1 , wherein the step of creating the dissolvable ceramic material mold in the additive manufacturing process comprises using sodium hydrogen phosphate as the liquid binding agent in the binder jetting process.

13. The method of claim 1 , wherein the step of creating the dissolvable ceramic material mold in the additive manufacturing process comprises using alumina flour, zircon flour, sodium hydrogen phosphate, and sugar as the powder particles in the binder jetting process.

14. A combined core and mold for creating a turbine component, comprising:
an inner core; and
an outer mold;
the inner core and the outer mold defining a sidewall and a plurality of inner ribs therebetween;
the inner core and the outer mold comprising a dissolvable ceramic material suitable for an additive manufacturing process comprising a binder jetting process in which a liquid binding agent is selectively deposited to join powder particles and dissolvable with water.

15. The combined core and mold of claim 14 , wherein the turbine component comprises an airfoil with internal cooling channels defined by the sidewall and the plurality of internal ribs.

16. A method of producing a turbine airfoil with a plurality of internal channels, comprising:
creating a combined core and mold of a dissolvable ceramic material in an additive manufacturing process comprising a binder jetting process in which a liquid binding agent is selectively deposited to join powder particles;
casting a metallic material in the combined core and mold;
creating the turbine airfoil; and
dissolving the dissolvable ceramic material with water within the plurality of internal channels.

17. The method of claim 16 , wherein the step of dissolving the dissolvable ceramic material with water comprises dissolving the combined core and mold with water.

18. The method of claim 16 , wherein the step of dissolving the dissolvable ceramic material comprises creating the plurality of internal channels and a sidewall in the turbine airfoil.

19. The method of claim 16 , wherein the step of creating the combined core and mold comprises creating the core and the mold together in the additive manufacturing process.

20. The method of claim 16 , wherein the step of creating the combined core and mold of the dissolvable ceramic material in the additive manufacturing process comprises using sodium hydrogen phosphate as the liquid binding agent in the binder jetting process.

Assignees

• Gen Electric

Inventors

• Cui Yan
• Kottilingam Srikanth Chandrudu
• Schick David Edward

Classifications

• B22C9/24

  for hollow articles · CPC title

• B33Y80/00

  Products made by additive manufacturing · CPC title

• B22C9/105

  Salt cores · CPC title

• B22D29/00

  Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots {(B22D13/10, B22D11/124, B22D17/00 take precedence)} · CPC title

• B22C1/16

  characterised by the use of binding agents; Mixtures of binding agents · CPC title