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AFS/FEF Student Technology Contest

Critical Characteristics Affecting the Surface Finish of Castings

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Abstract

Surface finish is an integral part of casting quality specifications. Rough internal surface finishes on castings can cause the loss of efficiency for both fluids and high-velocity gasses, and such is the case for turbocharger and intake manifold components. The University of Northern Iowa has been investigating mold material characteristics that affect surface smoothness for castings. The research was conducted on aluminum castings but has applications and relevance in ferrous alloys that do not exhibit defects such as penetration or fused sand defects. The study investigates the influence of molding media characteristics such as sand fineness, material type, and refractory coating selection. The goal of the project was to accomplish investment casting surface finishes in sand cast parts.

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References

  1. E. Swing, G.J. Vingas, R.R. Schaaf, Trans. Am. Foundrym. Soc. V 70, 584–611 (1962)

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  2. C.E. McQuiston, Influence of sand grain distribution on green-sand casting finish. AFS Trans. (1957), Paper 57-11

  3. S. Giese, An investigation on the role of sand-metal contact angle in the formation of casting penetration defects: phase II. AFS Trans. (1992), Paper 92-60

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Acknowledgements

The authors would like to acknowledge the effort put forth by fellow University of Northern Iowa students and staff members for their assistance in the research. The authors also wish to acknowledge H.A. International for the donation of refractory coatings and the Oak Ridge National Lab for funding the research.

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Authors and Affiliations

  1. University of Northern Iowa, Cedar Falls, IA, USA

    Nathaniel Bryant & Jerry Thiel

Authors
  1. Nathaniel Bryant
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  2. Jerry Thiel
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Correspondence to Nathaniel Bryant.

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Bryant, N., Thiel, J. AFS/FEF Student Technology Contest. Inter Metalcast 12, 186–195 (2018). https://doi.org/10.1007/s40962-017-0183-2

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  • DOI: https://doi.org/10.1007/s40962-017-0183-2

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