Development of a technology for the production of ceramic moulds with reduced thermal conductivity to control the solidification of thin-walled castings

• Autorzy: Leśniewski W. , Wawrylak M. , Wieliczko P. , Gil A. , Małysza M. , Szczepaniak-Lalewicz K.

Identyfikatory

DOI

10.7356/iod.2017.24

• Języki publikacji: EN

Abstrakty

EN

During the project a technology of making ceramic moulds using aluminosilicate microspheres was developed. According to the developed technology, ceramic samples were used to determine thermal conductivity in the temperature range of 500°C to 850°C. In this temperature range, thermal conductivity is about 0.5 W/mK. Strength measurements were conducted using a four-point bending technique. The strength of the developed ceramics and typical ceramics made from molochite materials is similar. Computer simulations facilitated the design of experimental moulds. The recording of Al alloy cooling curves in rectangular insulated and non-insulated moulds allowed for comparison of the thermal parameters of both types of moulds (i.e. ceramics). There was also a castability test performed using the moulds with a “grille” model with 1.5 × 1.5 mm channels, which determined the effect of increased material insulation on the number of properly filled mesh of the mould.

Słowa kluczowe

EN

ceramic moulds; aluminium alloys; thermal conductivity; thin-walled castings; microspheres

• Wydawca: Instytut Odlewnictwa
• Czasopismo: Prace Instytutu Odlewnictwa
• Rocznik: 2017
• Tom: Vol. 57, no. 4
• Strony: 259--263
• Opis fizyczny: Bibliogr. 8 poz., rys., tab.

Twórcy

autor

Leśniewski W.

• Foundry Research Institute, ul. Zakopiańska 73, 30-418 Krakow, Poland

autor

Wawrylak M.

• Foundry Research Institute, ul. Zakopiańska 73, 30-418 Krakow, Poland

autor

Wieliczko P.

• Foundry Research Institute, ul. Zakopiańska 73, 30-418 Krakow, Poland

autor

Gil A.

• Foundry Research Institute, ul. Zakopiańska 73, 30-418 Krakow, Poland

autor

Małysza M.

• Foundry Research Institute, ul. Zakopiańska 73, 30-418 Krakow, Poland

autor

Szczepaniak-Lalewicz K.

• Foundry Research Institute, ul. Zakopiańska 73, 30-418 Krakow, Poland

Bibliografia

• 1. Karwiński A., P. Wieliczko, L. Leśniewski. 2006. „Zastosowanie odlewania odśrodkowego do wykonywania cienkościennych odlewów precyzyjnych”. Archives of Foundry 6 (18) : 255‒260.
• 2. Myszka D., A. Karwiński, W. Leśniewski, P. Wieliczko. 2007. “Influence of the type of ceramic moulding materials on the top layer of titanium precision castings”. Archives of Foundry Engineering 7 (1) : 153‒156.
• 3. Ashby M.F., D.R.H. Jones. 1986. Engineering Materials 2. An Introduction to Microstructures, Processing and Design. First edition, book 2. Pergamon.
• 4. Apparatus for measuring thermal conductivity of ceramic materials, Leśniewski Wojciech, Edward Czekaj, Poland, 2012, Patent PL-210610.
• 5. Flow Science, Inc. 2004. Multi-Block Gridding Technique for FLOW-3D.
• 6. Sowa L., A. Bokota. 2007. “Numerical modelling of thermal and fluid flow phenomena in the mould channel”. Archives of Foundry Engineering 7 (4) : 165‒168.
• 7. Orlicki R., J. Kasperski, M. Jaworska. 1989. “Comparative examinations of Micromed-1-04 alloy fluidity with other Co-Cr-Mo alloys”. Prosthodontics / Protetyka Stomatologiczna 39 (1) : 38–40.
• 8. Leśniewski W., P. Wieliczko, M. Małysza. 2015. „Doświadczalna weryfikacja symulacji procesu odlewania odśrodkowego w formach ceramicznych / Experimental verification of the simulation of centrifugal casting in ceramic moulds”. Prace Instytutu Odlewnictwa / Transactions of the Foundry Research Institute 55 (1) : 23‒29.

Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).