Numerical analysis of influence of the mold material on the distribution of shrinkage cavities

• Autorzy: Dyja R.
• Języki publikacji: EN

Abstrakty

EN

Production of castings, like any other field of technology is aimed at providing high-quality product, free from defects. One of the main causes of defects in castings is the phenomenon of shrinkage of the casting. This phenomenon causes the formation of shrinkage cavities and porosity in the casting. The major preventive measure is supplementing a shortage of liquid metal. For supplement to be effective, it is necessary to use risers in proper shapes. Usually, the risers are selected on the basis of determination the place of formation of hot-spots in the castings. Although in these places the shrinkage defects are most likely to occur, shape and size of these defects are also affected by other factors. The article describes the original program setting out the shape and location of possible cavities in the casting. In the program is also taken into account the effect of temperature on the change in volume of liquid metal and the resultant differences in the shape and size of formed shrinkage cavities. The aim of the article is to describe the influence that have material properties of the mold on the simulation results.

Słowa kluczowe

EN

information technology; foundry industry; casting defect; macroshrinkage; solidification process; finite element method

PL

technologia informacyjna; przemysł odlewniczy; wada odlewu; krzepnięcie stopu; metoda elementów skończonych

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2013
• Tom: Vol. 13, iss. 1
• Strony: 15--18
• Opis fizyczny: Bibliogr. 9 poz., rys., tab.

Twórcy

autor

Dyja R.

• Institute of Computer and Information Sciences, Częstochowa University of Technology, ul. J. Dąbrowskiego 73, 42-201 Częstochowa, Poland

Bibliografia

• [1] Skrzypczak T., Węgrzyn-Skrzypczak E. (2010). Simulation of shrinkage cavity formation during solidification of binary alloy, Archives of Foundry Engineering 10(1), 147-152.
• [2] Sowa L. (2002). Numerical simulation of the shrinkage cavity within solidifying steel casting (in Polish), Archives of Foundry 2(4), 245-250.
• [3] Zienkiewicz O.C., Taylor R.L. (2000). The finite element method, Volume 1 – The Basis, Butterrworth-Heinemann, Oxford.
• [4] Sczygiol N., Szwarc G. (2000). Approaches to enthalpy approximation in numerical simulation of two-component alloy solidification, CAMES 7, 717-734.
• [5] Dyja R., Sczygiol N. (2011). Method for determining the formation of shrinkage defects in the castings, Archives of Foundry Engineering 11(4), 35-40.
• [6] Sczygiol N., Szwarc G., Olas T., Nagórka A. (1997). Object-oriented analysis of solidification modelled by finite elements (in Polish), Solidification of Metals and Alloys 30, 233-242.
• [7] Mutwil J., Romankiewicz A., Romankiewicz R. (2003). Density investigations of liquid aluminium-silicon alloys (in Polish), Archives of Foundry 3(10), 53-60.
• [8] Bokota A., Sowa L. (2001). Application of finite element method for modeling of fluidity test (in Polish), Archives of Foundry 1(1), 52-47.
• [9] Stefanescu, D.M. (2009). Science and Engineering of Casting Solidification. Springer Science+Business Media, New York.