Additively manufactured casting articles for manufacturing gas turbine engine parts

Patent metadata

Field	Value
Publication number	US-10040115-B2
Application number	US-201514870430-A
Country	US
Kind code	B2
Filing date	Sep 30, 2015
Priority date	Oct 31, 2014
Publication date	Aug 7, 2018
Grant date	Aug 7, 2018

Abstract

A casting article according to an exemplary aspect of the present disclosure includes, among other things, a circuit forming portion and an interior channel formed inside of the circuit forming portion. The interior channel defines a leaching path that extends at least partially through the circuit forming portion.

First claim

What is claimed is:

1. A casting article, comprising:
a circuit forming portion;
an interior channel formed inside of said circuit forming portion;
said interior channel defining a leaching path that extends at least partially through said circuit forming portion, wherein said interior channel includes an inlet and an outlet, and said leaching path extends between said inlet and said outlet; and
at least one porous area formed in an outer shell body surrounding said interior channel at a portion of said outer shell body surrounding said interior channel and having a first density that is less than a second density of a second portion of said outer shell body and configured to increase compressibility of the casting article during a casting process.

2. The casting article as recited in claim 1 , wherein said circuit forming portion is one of a leading edge circuit forming portion, a serpentine circuit forming portion, and a trailing edge circuit forming portion.

3. The casting article as recited in claim 1 , wherein said casting article is an additively manufactured core that is made of at least one of silica, alumina and a refractory metal.

4. The casting article as recited in claim 1 , comprising a plurality of circuit forming portions and a stabilizer portion connected to at least one of said plurality of circuit forming portions.

5. The casting article as recited in claim 1 , wherein said interior channel is a high convection channel formed through said circuit forming portion.

6. The casting article as recited in claim 5 , comprising a plurality of said interior channels formed through said circuit forming portion.

7. The casting article as recited in claim 1 , wherein said interior channel is a maximum surface area interior channel surrounded by an outer shell body.

8. The casting article as recited in claim 1 , wherein said circuit forming portion includes a first leg that includes said interior channel and a second leg that includes a second interior channel configured differently than said interior channel.

9. The casting article as recited in claim 1 , wherein said leaching path is configured to receive a leaching fluid communicated into said inlet, circuited along said leaching path, and then expelled through said outlet to leach said article from a cast part.

10. The casting article as recited in claim 9 , wherein said inlet is at a first end of said circuit forming portion, and said outlet is at a second end of said circuit forming portion opposite said first end.

11. The casting article as recited in claim 1 , wherein said inlet is at a first end of said circuit forming portion, and said outlet is at a second end of said circuit forming portion opposite said first end.

12. The casting article as recited in claim 11 , comprising a stabilizer portion adjacent said second end for stabilizing a positioning of said circuit forming portion.

13. The casting article as recited in claim 12 , wherein said stabilizer portion is configured to establish a tip plenum of a cast part.

14. The casting article as recited in claim 1 ,
a second circuit forming portion;
a second interior channel formed inside of said second circuit forming portion; and
said second interior channel defining a second leaching path that extends at least partially through said second circuit forming portion, wherein said second interior channel includes a second inlet and a second outlet, and said second leaching path extends between said second inlet and said second outlet.

15. The casting article as recited in claim 14 , wherein said second outlet is separate and distinct from said outlet.

16. The casting article as recited in claim 14 ,
a third circuit forming portion;
a third interior channel formed inside of said third circuit forming portion; and
said third interior channel defining a third leaching path that extends at least partially through said third circuit forming portion, wherein said third interior channel includes a third inlet and a third outlet, and said third leaching path extends between said third inlet and said third outlet.

17. The casting article as recited in claim 16 , wherein
said inlet is at a first end of said circuit forming portion, and the outlet is at a second end of said circuit forming portion opposite said first end;
said second inlet is at a first end of the second circuit forming portion, and said second outlet is at a second end of said circuit forming portion opposite said first end of said second circuit forming portion; and
said third inlet is at a first end of said third circuit forming portion, and said third outlet is at a second end of said third circuit forming portion opposite said first end of said third circuit forming portion.

Assignees

• United Technologies Corp

Inventors

• Slavens Thomas N
• Zelesky Mark F
• Xu Jinquan
• Wagner Joel H

Classifications

• B22F12/60

  Planarisation devices; Compression devices · CPC title

• B22F10/28

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

• B28B1/001

  Rapid manufacturing of 3D objects by additive depositing, agglomerating or laminating of material (selective deposition modelling of metallic powder B22F10/00; rapid manufacturing of 3D objects in general and in particular of plastics B29C64/00) · CPC title

• F05D2240/12

  Fluid guiding means, e.g. vanes · CPC title

• B28B7/346

  Manufacture of moulds · CPC title