The Effect of Metal Pouring Conditions on the Formation of Defects in the Casting

• Autorzy: Sowa L. , Skrzypczak T. , Kwiatoń P.

Identyfikatory

DOI

10.24425/afe.2020.131298

• Języki publikacji: EN

Abstrakty

EN

The mathematical model and numerical simulations of the solidification of a cylindrical casting, which take into account the process of the mould cavity filling by liquid metal and the feeding of the casting through the conical riser during its solidification, are proposed in the paper. The interdependence of thermal and flow phenomena were taken into account because they have an essential influence on solidification process. The effect of the pouring temperature and pouring velocity of the metal on the solidification kinetics of the casting was determined. In order to obtain the casting without shrinkage defects, an appropriate selection of these parameters was tried, which is important for foundry practice. The velocity fields have been obtained from the solution of Navier-Stokes equations and continuity equation, while temperature fields from solving the equation of heat conductivity containing the convection term. In the solidification modelling the changes in thermo-physical parameters as a function of temperature were considered. The finite element method (FEM) was used to solve the problem.

Słowa kluczowe

EN

castings defects; solidification process; numerical modelling; molten metal flow

PL

wady odlewów; proces krzepnięcia; modelowanie numeryczne; ciekły metal

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2020
• Tom: Vol. 20, iss. 2
• Strony: 31--36
• Opis fizyczny: Bibliogr. 11 poz., rys., tab., wykr.

Twórcy

autor

Sowa L.

• Częstochowa University of Technology, Institute of Mechanics and Machine Design Fundamentals Częstochowa, Poland

autor

Skrzypczak T.

• Częstochowa University of Technology, Institute of Mechanics and Machine Design Fundamentals Częstochowa, Poland

autor

Kwiatoń P.

• Częstochowa University of Technology, Institute of Mechanics and Machine Design Fundamentals Częstochowa, Poland

Bibliografia

• [1] Grześkowiak, K., Wojciechowski, M. & Sytek K. (2013). The effect of the method of pouring liquid metal into mould on misrun formation in the castings made with lost-wax casting technology. Archives of Mechanical Technology and Automation. 33(4), 15-19.
• [2] Szajnar, J., Stawarz, M., Wróbel, T., Sebzda, W., Grzesik, B. & Stępień M. (2010). Influence of continuous casting conditions on grey cast iron structure. Archives of Materials Science and Engineering. 42(1), 45-52.
• [3] Miłkowska-Piszczek, K. & Korolczuk-Hejnak M. (2013). An analysis of the influence of viscosity on the numerical simulation of temperature distribution as demonstrated by the CC process. Archives of Metallurgy and Materials. 58 (4), 1263-1274. DOI: 10.2478/amm-2013-0146.
• [4] Eriksson, R., Jonsson, L. & Jönsson P.G. (2004). Effect of entrance nozzle design on the fluid flow in an ingot mold during filling. ISIJ International. 44(8), 1358-1365.
• [5] Huang, P-H. & Lin C-J. (2015). Computer-aided modeling and experimental verification of optimal gating system design for investment casting of precision rotor. International Journal of Advanced Manufacturing Technology. 79(7-8), 997-1006. DOI: 10.1007/s00170-015-6897-5.
• [6] Lewis, R.W., Postek, E.W., Han, Z. & Gethin D.T. (2006). A finite element model of the squeeze casting process. International Journal of Numerical Methods for Heat & Fluid Flow. 16(5), 539-572. DOI: 10.1108/ 09615530610669102.
• [7] Dyja, R., Gawrońska, E. & Grosser A. (2018). A computer simulation of solidification taking into account the movement of the liquid phase. MATEC Web of Conferences. 157, 1-9. DOI: 10.1051/matecconf/201815702008.
• [8] Skrzypczak, T., Węgrzyn-Skrzypczak, E. & Sowa L. (2018). Numerical modeling of solidification process taking into account the effect of air gap. Applied Mathematics and Computation. 321, 768-779. DOI: 10.1016/j.amc. 2017.11.023.
• [9] Sowa, L., Skrzypczak, T. & Kwiatoń P. (2019). Computer evaluation of the influence of liquid metal movements on defects formation in the casting. MATEC Web of Conferences. 254, 1-9. 02017. DOI: 10.1051/matecconf/ 201925402017.
• [10] Nadolski, M., Zyska, A., Konopka, Z., Łągiewka, M. & Karolczyk J. (2011). The assessment of bell casting producibility based on computer simulation of pouring and solidification. Archives of Foundry Engineering. 11(3), 141-144.
• [11] Perzyk, M., Kochański, A., Mazurek, P. & Karczewski K. (2014). Selected principles of feeding systems design: simulation vs industrial experience. Archives of Foundry Engineering. 14(4), 77-82.

Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020)