Cast components and manufacture and use methods

Patent metadata

Field	Value
Publication number	US-10919082-B2
Application number	US-201916245787-A
Country	US
Kind code	B2
Filing date	Jan 11, 2019
Priority date	Jul 1, 2014
Publication date	Feb 16, 2021
Grant date	Feb 16, 2021

Abstract

A method comprises: providing a spiral metallic workpiece having a cast structure associated with such spiral; and at least partially flattening the workpiece.

First claim

What is claimed is:

1. A method comprising:
casting a metallic workpiece having a spiral gap wherein the spiral gap is formed in the casting step; and
at least partially flattening the workpiece by unrolling.

2. The method of claim 1 wherein:
the metallic workpiece has a single crystal (SX) structure.

3. The method of claim 1 wherein:
the metallic workpiece has a modified single crystal (SX) structure characterized by a progressively circumferentially varying crystallographic orientation.

4. The method of claim 1 wherein:
the spiral of the spiral gap is about an axis within 5° of a <001> or <111> direction of the workpiece.

5. The method of claim 1 wherein:
the metallic workpiece is a right circular cylinder with said spiral gap.

6. The method of claim 1 wherein:
the metallic workpiece is a hollow right circular cylinder with said spiral gap.

7. The method of claim 1 wherein:
the workpiece is a nickel-based superalloy.

8. The method of claim 1 further comprising:
securing ends of the workpiece to each other or to ends of other similar workpieces so as to form a full hoop.

9. The method of claim 8 wherein:
the securing comprises welding.

10. The method of claim 1 wherein the casting comprises withdrawing from a furnace in a direction within 1° of parallel to an axis of the spiral of the spiral gap.

11. The method of claim 1 wherein the casting comprises forming a mold by shelling a spiral core.

12. The method of claim 11 further comprising forming the spiral core by bending a refractory metal sheet and ceramic coating the sheet.

13. The method of claim 11 further comprising forming the spiral core by rolling into a spiral a sandwich of a cloth sheet and wax.

Assignees

• Raytheon Tech Corp

Inventors

• Shah Dilip M
• Cetel Alan D
• Marcin Jr John J
• Bullied Steven J
• Verner Carl R

Classifications

• C30B11/002 Primary

  Crucibles or containers for supporting the melt · CPC title

• C30B29/52

  Alloys · CPC title

• B23P15/02

  turbine or like blades from one piece · CPC title

• B22D21/00

  Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor {(non-ferrous ingots B22D7/005)} · CPC title

• Y10T29/49989

  Followed by cutting or removing material · CPC title