Silica-Kaolin Mix Effect on Evaporative Pattern Castings Surface Roughness

• Autorzy: Omidiji B. V. , Khan R. H. , Abolarin M. S.

Identyfikatory

DOI

10.1515/afe-2016-0055

• Języki publikacji: EN

Abstrakty

EN

The influence of the refractory coating which is a mixture of silica flour and kaolin on the surface roughness of the plate castings produced using evaporative patterns had been considered in this work. The kaolin was used as a binder and ratio method was employed to form basis for the factorial design of experiment which led to nine runs of experiments. Methyl alcohol at 99% concentration was used as the carrier for the transfer of the coating to the surface of the patterns. Pouring temperature was observed as a process parameter alongside the mix ratios of the coating. Attempts were made to characterize the refractory coating by using two methods; differential thermal analysis (DTA) and X-ray diffraction. Attempt was also made to characterize the casting material. Gating system design was done for the plate casting to determine the correct proportions of the gating parameters in order to construct the gating system properly to avoid turbulence during pouring of liquid metal. A digital profilometer was used to take the measurements of the surface roughness. It was observed that the mix ratio 90% silica flour-10% kaolin produced the lowest value of the surface roughness of the plate castings and had the lowest material loss in the DTA test. The pouring temperature of 650^oC produced best casting.

Słowa kluczowe

EN

refractory coating; casting surface; binder; temperature; pattern

PL

powłoka ogniotrwała; powierzchnia odlewów; spoiwo; temperatura

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2016
• Tom: Vol. 16, iss. 3
• Strony: 83--88
• Opis fizyczny: Bibliogr. 12 poz., rys., tab., wykr.

Twórcy

autor

Omidiji B. V.

• Obafemi Awolowo University, Ile-Ife, Nigeria Federal University of Technology, Minna, Nigeria

autor

Khan R. H.

• Obafemi Awolowo University, Ile-Ife, Nigeria Federal University of Technology, Minna, Nigeria

autor

Abolarin M. S.

• Obafemi Awolowo University, Ile-Ife, Nigeria Federal University of Technology, Minna, Nigeria

Bibliografia

• [1] Lessiter, M.J. (1996). Expendable Pattern Casting: State of the Process’. Modern Casting. 84(1), 36-38.
• [2] Houzeaux, G. & Codina, R. (2004). A finite element model for the simulation of lost foam casting. International Journal of Numerical Methods in Fluids. 46, 203-226.
• [3] Chen, X., Penumadu, D. (2008). Permeability measurement and numerical modeling for refractory porous materials. AFS tractions, America Foundry Society, Schaumburg IL, USA.
• [4] Lee, K-W., Cho, G-S., Choe, K-H., Jo, H-H., Ikenaga, A. & Koroyasu, S. (2006). Effects of Reduced Pressure and Coat Permeability on Casting Characteristics of Magnesium Alloy in Evaporative Pattern Casting Process. Materials Transactions. 47(11), 2798-2803.
• [5] Kumar, S., Kumar, P., & Shan, H.S. (2009). Characterization of the refractory coating material used in vacuum assisted evaporative pattern casting process. Journal of Material Processing Technology. 209, 2699-2706.
• [6] Nwaogu, U.C. & Tiedje, N.S. (2011). Foundry Coating Technology: A Review. Material Sciences and Application. 2, 1143-1160.
• [7] Singh, B., Kumar, P., Mishra, B.K. (2011). Parametric Optimisation of Casting Surface Roughness Produced by Ceramic Shell Investment Casting Process. National Conference on Advancements and Futuristic Trends in Mechanical and Materials Engineering.
• [8] Groover, M.P. (2010). Fundamentals of Modern Manufacturing Materials, Processes and Systems, John Willey and Sons Inc, New York.
• [9] Rao, P.N. (2001) Manufacturing Technology: Foundry, Forming and Welding, Tata McGraw-Hill Publishing Company Limited, New Delhi.
• [10] Omidiji, B.V., Owolabi, H.A. & Khan, R.H. (2015). Application of Taguchi’s approach for obtaining mechanical properties and microstructures of evaporative pattern castings, International Journal of Advanced Manufacturing Technology. 79, 461-468.
• [11] Kumar, S., Kumar, P., & Shan, H.S. (2008). Optimization of tensile properties of evaporative pattern casting process through Taguchi’s method. Journal of Material Processing Technology. 204, 59-69.
• [12] Kumar, S., Kumar, P. & Shan, H.S. (2006). Parametric optimization of surface roughness castings produced by Evaporative Pattern Casting Process. Materials letters. 60, 3048-3053.

Uwagi

PL

Opracowane ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.