High Temperature Thermal Properties of Bentonite Foundry Sand

• Autorzy: Krajewski P. K. , Suchy J. S. , Piwowarski G. , Krajewski W. K.

Identyfikatory

DOI

10.1515/afe-2015-0036

• Języki publikacji: EN

Abstrakty

EN

The paper presents results of measuring thermal conductivity and heat capacity of bentonite foundry sand in temperature range ambient – 900 °C. During the experiments a technical purity Cu plate was cast into the green-sand moulds. Basing on measurements of the mould temperature field during the solidification of the casting, the temperature relationships of the measured properties were evaluated. It was confirmed that water vaporization strongly influences thermal conductivity of the moulding sand in the first period of the mould heating by the poured casting.

Słowa kluczowe

EN

casting; solidification; bentonite sand mould; thermophysical properties

PL

odlewanie; krzepnięcie; piasek formierski; bentonit; właściwości termofizyczne

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2015
• Tom: Vol. 15, iss. 2
• Strony: 47--50
• Opis fizyczny: Bibliogr. 11 poz., rys., tab., wykr.

Twórcy

autor

Krajewski P. K.

• Department of Foundry Processes Engineering, Faculty of Foundry Engineering, AGH University of Science and Technology, 23 Reymonta Street, 30-059 Krakow, Poland

autor

Suchy J. S.

• Department of Foundry Processes Engineering, Faculty of Foundry Engineering, AGH University of Science and Technology, 23 Reymonta Street, 30-059 Krakow, Poland

autor

Piwowarski G.

• Department of Foundry Processes Engineering, Faculty of Foundry Engineering, AGH University of Science and Technology, 23 Reymonta Street, 30-059 Krakow, Poland

autor

Krajewski W. K.

• Department of Foundry Processes Engineering, Faculty of Foundry Engineering, AGH University of Science and Technology, 23 Reymonta Street, 30-059 Krakow, Poland

Bibliografia

• [1] Krajewski, P.K., Zovko–Brodarac, Z. & Krajewski, W.K. (2013). Heat Exchange in the System Mould – Riser – Ambient. Part I: Heat exchange coefficient from mould external surface. Archives of Metallurgy and Materials 58(3), 833-835. DOI: 10.2478/amm-2013-0081.
• [2] Krajewski, P.K., Gradowski, A. & Krajewski, W.K. (2013). Heat Exchange in the System Mould – Riser – Ambient. Part II: Heat emission coefficient from open riser surface to ambient. Archives of Metallurgy and Materials. 58(4), 1149-1153. DOI: 10.2478/amm-2013-0140.
• [3] Krajewski, P.K., Magda, K. & Stojecki, P. (2013). Examining and modelling the influence of thermo-physical properties of liquid metal and sand mould on solidification time of pure Al castings. Archives of Foundry Engineering 13(spec. 3), 89–94.
• [4] Ignaszak, Z. (1989). Thermo-physical properties of materials in terms of forms of casting solidification process control. Poznań: Wydawnictwo Politechniki Poznańskiej. (in Polish).
• [5] Krajewski, P.K., Piwowarski, G., Suchy, J.S. (2012). Formulating the boundary conditions for numerical model of heat transfer in a system heat source – heat sink. Thermal conductivity of the system, Proceedings of the 1st International Workshop "90 Years of Foundry Engineers Educating by the AGH University of Science and Technology", Faculty of Foundry Engineering, http://www.1odlewnictwo.agh.edu.pl/inne/konferencje/konferencja_2012/abstract/streszczenia.html.
• [6] Kubo, K. & Pehlke, R.D. (1986). Heat and moisture transfer in sand molds containing water. Metallurgical Transactions 17B(Dec.1986), 903-911.
• [7] Ignaszak, Z., Graczyk, L. & Popielarski, P. (2006). Eksperymentalno–symulacyjny sposób identyfikacji strefy przewilżonej w formie. Archives of Foundry 6(22), 216–223.
• [8] Krajewski, P.K., Piwowarski, G. & Krajewski, W.K. (2014). Determining Temperature Dependencies of Sand Mould Thermal Properties. Materials Science Forum 791-792, 452-457. Doi:10.4028/www.scientific.net/MSF.790-791.452.
• [9] Krajewski, P.K., Piwowarski, G., Suchy, J.S. & Krajewski, W.K. (2014). Thermo-physical properties vs. temperature of selected foundry sands. Proceedings of 71st World Foundry Congress. Bilbao, Spain: World Foundry Organization (on USB flash).
• [10] Krajewski, P.K., Piwowarski,G., Żak, P.L. & Krajewski, W.K. (2014). Experiment and numerical modelling the time of plate-shape casting solidification vs. thermal conductivity of mould material. Archives of Metallurgy and Materials. 59(4), 1405-1408. DOI: 10.2478/amm-2014-0238.
• [11] Krajewski, P.K., Piwowarski, G. & Suchy, J.S. (2014). Thermal conductivity of the green-sand mould poured with copper. Archives of Foundry Engineering. 14(spec.4), 67-70.