Abstract
This paper deals with the study of the effect of primary slurry parameters on the plate weight (ceramic retention test) in ceramic shell investment casting process. Four controllable factors of the zircon flour and fused-silica powder based slurries were studied at three levels each by Taguchi’s parametric approach and single-response optimization of plate weight was conducted to identify the main factors controlling its stability. Variations in coating thickness with plate weight were calculated for each slurry and ceramic shell moulds were made on wax plate using primary slurry and coarse fused-silica sand as stucco. The Scanning Electronic Microscopy (SEM) technique has been used to study the surface morphology of zircon flour and fused silca powder particles as well as primary coating (shell surface). X-ray Diffraction (XRD) analysis was done to identify the various phases present in the ceramic slurry coating. Optical profilometer has been used to measure the surface roughness of the shells. The result reveals that the surface condition of shell can be improved by increasing the plate weight, corresponding to higher filler loading in the slurry. Confirmation experiments were conducted at an optimal condition showed that the surface quality of the ceramic shell mould were improved significantly. Castings were produced using Al-7%Si alloy in recommended parameters through ceramic shell investment casting process. Surface roughness of the produced casting were measured and presented in this paper.
References
E. Green-Spikesley Investment Casting. Mater. Eng. Appl., Vol. 1, 1979, pp. 328–334
S. Jones, C. Yuan, Advances in Shell Moulding for Investment Casting. J. Mater. Process. Technol. 135, 2003, pp 258–265
N.A. Luneav, Coefficient of Thermal Expansion of Investment Mould. Sov. Cast. Technol., 1, 1987, pp 36–40
W.O. Roberts, Factors Affecting Shell Strength, 25th ICI Conference, Denver, Colorado, USA, 1977
C.H. Schwartz, New Developments in Ceramic Shell Composition. AFS Trans. 134, 787–790, 1987
R.A. Horton, Coating and drying, ASM Handbook; Casting, Vol. 15, ASM, USA, 1992, p 260
Cui Y.Y., Yang R. Influence of Powder-Size Matching on the Surface Quality of Ceramic Mould Shell for Investment Casting of Titanium Alloys Int. J. Mater. Product Technol., Vol. 2, 2001, p 793–798
P.R. Beeley, R.F. Smart, Investment Casting, 1st ed., The University Press, Cambridge, UK, 1995, p. 23–90
P.J. Ross, Taguchi Techniques for Quality Engineering, McGraw-Hill Book Company, New York 1988
R.K. Roy, A Primer on Taguchi Method, Van Nostrand Reinhold, New York 1990
P. Sharma, A. Verma, R.K. Sidhu, O.P. Pandey, Process Parameter Selection for Strontium Ferrite Sintered Magnets Using Taguchi L9 Orthogonal Design J. Mater. Process. Technol. 168, 2005, p 147–151
R.R. Stratton, Ceramics Testing Guidebook, Dallas, TX, Investment Casting Institute, 1979
S. Kumar, P. Kumar, H.S. Shan, Parametric Optimization of Surface Roughness Castings Produced by Evaporative Pattern Casting process, Mater. Lett., 2006, 60, 3048–3053
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The authors acknowledge the Ministry of Human Resource Development (MHRD), New Delhi for funding the present work.
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Sidhu, B.S., Kumar, P. & Mishra, B. Effect of Slurry Composition on Plate Weight in Ceramic Shell Investment Casting. J. of Materi Eng and Perform 17, 489–498 (2008). https://doi.org/10.1007/s11665-007-9162-8
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DOI: https://doi.org/10.1007/s11665-007-9162-8