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1

Influence of pouring temperature on a thermal gradient

Suchoń J., Cholewa M.

Archives of Foundry Engineering

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2010

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Vol. 10, iss. 1

167-174

EN

In the thesis there are presented results of computer simulation of casting solidification process, characteristics of solidification rate in several points as well as course of gradient change between these points. Based on the obtained results, an influence of initial conditions on temperature gradient during the solidification process was determined.

2

The problems connected with the solidification parameters estimation

Bartocha D.

Archives of Foundry Engineering

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2008

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Vol. 8, iss. 1

198-208

EN

In the article results of thermo-physical properties estimation are presented. Thermo-physical properties estimation was carried out with trial-and-error method on the base of the model computer simulations results. In the first step the computer simulations of self-cooling and heating processes for different thermo-physical properties of specimen alloy and for proposed two testers geometry was carried out. thermo-physical properties of specimen alloy were artifical, assumed by author. The results of simulation in the form of self-cooling and heating curves were used in the second step of work. In the second step the computer simulations to thermo-physical properties estimation by trial-and-error method was carried out. In these simulations only thermo-physical properties of specimen alloy were estimated, thermophysical properties of others materials and boundary conditions were exactly the same as in model simulations. finally thermo-physical properties assumed in first step were compared to estimated in second step.

3

Numeryczna symulacja procesu krzepnięcia nadlewu w formie z modułem izolacyjnym

Gradowski A.

Archiwum Odlewnictwa

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2006

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R. 6, nr 21/2

185-192

PL

W artykule przedstawiono model symulacji liczbowej procesu zasilania metalem odlewu płyty staliwnej, stosując w tym celu wybrane rodzaje nadlewów. Zastosowanie formy z wnęką wyłożoną materiałem izolacyjnym sprawia, że na bocznej powierzchni nadlewu zachodzi zmniejszona wymiana ciepła. Celem badań zaprezentowanych w tym artykule było przeprowadzenie analizy liczbowej procesu krzepnięcia ciekłego metalu oraz przemieszczenia i rozkładu obszaru występowania jamy skurczowej w nadlewie o kształcie walca. W oparciu o model matematyczny i fizyczny wyżej wymienionego procesu opracowano program symulacyjny, który ma za zadanie wizualne, graficzne i cyfrowe przedstawienie charakterystycznych parametrów procesu. Opracowany program umożliwia optymalizację skuteczności procesu zasilania.

EN

The paper presents a model of numerical simulation of feeding process of caststeel plate by risers of the selected types. Application mould with insulating cavity is followed by a reduction of the heat exchanged on the lateral surface of the riser. The aim of this study is a numerical analysis of liquid metal solidification and displacement and distribution of area of the shrinkage cavity in the cylindrical riser. Based on a mathematical and physical model of the aforementioned processes there was developed simulation software for a visual, graphical and digital representation of the characteristic parameters of these processes. The software developed enables a optimization of feeding effectiveness process.