Single crystal investment cast components and methods of making same

Inactive Publication Date: 2005-09-29
UNITED TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0006] Accordingly, the above-identified shortcomings of existing investment casting systems and methods are overcome by embodiments of the present invention, which relates to novel investment casting systems and methods that yield high perfor

Problems solved by technology

In current investment casting systems and methods, single crystal casting techniques are used, but often result in undesirable crystal structures in the final

Method used

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  • Single crystal investment cast components and methods of making same
  • Single crystal investment cast components and methods of making same
  • Single crystal investment cast components and methods of making same

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[0017] For the purposes of promoting an understanding of the invention, reference will now be made to some preferred embodiments of this invention as illustrated in FIGS. 1-2 and specific language used to describe the same. The terminology used herein is for the purpose of description, not limitation. Specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims as a representative basis for teaching one skilled in the art to variously employ the present invention. Any modifications or variations in the depicted structures and methods, and such further applications of the principles of the invention as illustrated herein, as would normally occur to one skilled in the art, are considered to be within the spirit and scope of this invention.

[0018] This invention relates to systems and methods for creating high quality, high performance single crystal investment cast components. These systems and methods utilize ...

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Abstract

High performance single crystal investment cast components and methods of making same are described herein. Embodiments comprise systems for producing such components. The systems comprise: an investment molding cavity; a seed crystal starter cavity; a seed crystal for initiating epitaxial crystal growth in molten metallic material that comes into contact therewith; a grain selector operatively connecting the seed crystal starter cavity and the investment molding cavity for at least one of: (1) selecting a single crystal from the seed crystal to grow into the molten metallic material during solidification, or (2) ensuring that a single crystal from the seed crystal continues to grow into the molten metallic material during solidification; and a grain selector support for at least partially supporting the weight of the investment molding cavity and any molten metallic material contained therein to take at least a portion of this weight off the grain selector, wherein the system is capable of producing a single crystal investment cast component. Methods for producing such components are also described.

Description

FIELD OF THE INVENTION [0001] The present invention relates generally to investment casting. More specifically, the present invention relates to utilizing seeds, grain selectors, and grain selector supports to produce high performance single crystal cast components, and methods of making same. BACKGROUND OF THE INVENTION [0002] Investment casting has been used for many years to create near-net shape components that require minimal further machining after casting. Investment casting allows complex parts with intricate internal passages to be created. Generally, in the investment casting process, an injection molded wax pattern of a part is produced. The wax pattern may contain ceramic or refractory cores therein for creating the intricate internal passages in the finished component. Once formed, the wax pattern is encased in several layers of ceramic material to form a ceramic shell mold of the part. The wax is then removed from the ceramic shell mold via heating, and the ceramic she...

Claims

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Application Information

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IPC IPC(8): B22C9/06B22D23/00B22D21/00B22D27/04C22C19/05C30B11/00C30B29/52
CPCB22D27/045C30B29/52C30B11/00
Inventor BULLIED, STEVEN JOELMARCIN, JOHN JOSEPH JR.RENAUD, ROBERT CHARLESGARRISON, ROY ALANMURRAY, STEPHEN DOUGLAS
Owner UNITED TECH CORP
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