Refractory Materials Used for the Investment Casting Process and their Infuence on Ceramic Shell Properties

Joachim Wolff1, Michael Weissenbacher2, Clemens Lind2

1 Imerys Fused Minerals Murg GmbH, 79725 Laufenburg/Germany
2 Imerys Technology Center Austria GmbH, 9524 Villach/Austria

Revision

Volume 11, Issue 4, Pages 67 - 72

Abstract

Today, many different metals are being produced using the Investment Casting (IC) process. To ensure final high quality castings it is necessary to know the infuencing parameters of all the different steps during the whole process including the wax pattern, the ceramic shell and the final casted part. The research work described within this paper is about the ceramic shell, the parameters that need to be taken into account during the whole processing and the possibilities to evaluate and influence them in a proper way. The main parameters discussed are the casting dimensional accuracy, the hot properties of the shell and the shell building performance itself.

Keywords

investment casting, ceramic shell, ceramic slurry

References

[1] Luz, A.P.; et al.: Refractory castable engineering. Fundamentalson particle dispersion;particle size distribution and packing design; FIRE Compendium 1 (2015) Göller­Verlag, Germany 10–11 [2] Hatch, D.M.; et al.: The α­β phase transition in cristobalite, SiO2.Physics and Chemistry of Minerals 17 (1991) 554–562 [3] Graddick, S.; et al.: Thermal expansion of ceramic shell: a key for dimensional accuracy in turbo­charger production. 14th World Conference in Investment Casting, Paris (2016) [4] Bond. D.; et al.: Advanced wax testing and subsequent wax developments. Proc. of the 13th World Conf. on Investment Casting, Kyoto (2012) [5] Sabau, A.S.: Alloy shrinkage factors for the investment casting process. Metallurgical and Mater. Transactions,. 37 B (2006) 131–140. [6] Matthes, S.: Mineralogie – Eine Einführung in die spezielle Mineralogie, Petrologie und Lagerstättenkunde. 6th ed., Heidelberg 2001

Copyright

Göller Verlag GmbH