Separate vessel metal shielding method for magnetic flux in directional solidification furnace

Patent metadata

Field	Value
Publication number	US-10337121-B2
Application number	US-201715797855-A
Country	US
Kind code	B2
Filing date	Oct 30, 2017
Priority date	Oct 30, 2017
Publication date	Jul 2, 2019
Grant date	Jul 2, 2019

Abstract

An induction furnace assembly comprising a chamber having a mold; a primary inductive coil coupled to the chamber; a susceptor surrounding the chamber between the primary inductive coil and the mold; and a shield material contained in a reservoir coupled to or proximate the mold between the susceptor and the mold; the shield material configured to attenuate a portion of an electromagnetic flux generated by the primary induction coil that is not attenuated by the susceptor.

First claim

What is claimed is:

1. A process for directional solidification of a cast part comprising:
energizing a primary induction coil within a chamber having a mold containing a material;
generating an electromagnetic field with the primary induction coil within the chamber, wherein said electromagnetic field partially leaks through a susceptor coupled to said chamber between said primary induction coil and said mold;
controlling a component of a magnetic flux leakage with a shield material coupled to the mold; and
casting the material within the mold.

2. The process according to claim 1 , wherein said component of said magnetic flux leakage comprises a portion of a total electromagnetic field passing through said mold that is not attenuated by the susceptor.

3. The process according to claim 2 , wherein said susceptor comprises a constant thickness.

4. The process according to claim 2 , wherein the shield material attenuates a portion of the magnetic flux leakage generated by the primary induction coil that is not attenuated by the susceptor.

5. The process according to claim 1 , further comprising:
a reservoir coupled to said mold, said reservoir configured to contain said shield material.

6. The process according to claim 5 , wherein said reservoir is proximate said mold.

7. The process according to claim 1 , wherein said reservoir is integral with said mold.

8. An induction furnace assembly comprising:
a chamber having a mold;
a primary induction coil coupled to said chamber;
a susceptor surrounding said chamber between said primary induction coil and said mold; and
a shield material contained in a reservoir coupled to said mold between said susceptor and said mold; said shield material configured to attenuate a portion of an electromagnetic field generated by the primary induction coil that is not attenuated by said susceptor.

9. The induction furnace assembly according to claim 8 ; wherein the reservoir is integral with the mold.

10. The induction furnace assembly according to claim 8 , wherein the reservoir is adjacent to the mold.

11. The induction furnace assembly according to claim 8 , wherein the reservoir is proximate and unattached from the mold.

12. The induction furnace assembly according to claim 8 , wherein the shield material comprises an attenuator configured to attenuate a total electromagnetic field generated by said primary induction coil.

13. The induction furnace assembly according to claim 8 , wherein the shield material comprises material properties configured to attenuate the electromagnetic field at casting temperatures.

14. The induction furnace assembly according to claim 8 , wherein the shield material is identical to a casting material in said mold.

Assignees

• United Technologies Corp

Inventors

• Mantese Joseph V
• Breneman Ryan C
• Rebbecchi Thomas Anthony
• Boyne Andrew
• Marcin John Joseph
• Davis Dustin W
• Furrer David Ulrich
• Auxier James Tilsley

Classifications

• F27D11/06 Primary

  Induction heating, i.e. in which the material being heated, or its container or elements embodied therein, form the secondary of a transformer · CPC title

• C30B21/02

  by normal casting or gradient freezing · CPC title

• C30B30/04 Primary

  using magnetic fields · CPC title

• H05B6/105

  using a susceptor · CPC title

• F27D2099/0015

  Induction heating · CPC title