Gelcast Tooling: Net Shape Casting and Green Machining

Gelcasting is an advanced powder forming process. It is most commonly used to form ceramic or metal powders into complex, near-net shapes. Turbine rotors, gears, nozzles, and crucibles have been successfully gelcast in silicon nitride, alumina, nickel-based superalloy, and several steels. Gelcasting...

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Bibliographic Details
Published in:Materials and manufacturing processes 1998-05, Vol.13 (3), p.389-403
Main Authors: Janney, Mark A., Ren, Weiju, Kirby, Glen H., Nunn, Stephen D., Viswanathan, Srinath
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Foundry engineering
Metals. Metallurgy
Molding materials. Mold making. Core making
Production techniques
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Summary:Gelcasting is an advanced powder forming process. It is most commonly used to form ceramic or metal powders into complex, near-net shapes. Turbine rotors, gears, nozzles, and crucibles have been successfully gelcast in silicon nitride, alumina, nickel-based superalloy, and several steels. Gelcasting can also be used to make blanks that can be green machined to near-net shape and then high fired. Green machining has been successfully applied to both ceramic and metal gelcast blanks. Recently, we have used gelcasting to make toolinj; for metal casting applications. Most of the work has centered on H13 tool steel. We have demonstrated an ability to gelcast and sinter H13 to near net shape for metal casting tooling. We have also been successful in green machining gelcast blanks using a three-axis CNC milling machine.
ISSN:1042-6914
1532-2475
DOI:10.1080/10426919808935256