The mathematical model of heat flow in composite alloy layers
Józef Gawroński, Ewa Majchrzak, Mirosław Cholewa, Piotr Wróbel Politechnika Śląska, Wydział Mechaniczny Technologiczny, ul. Konarskiego 18a, 44-100 Gliwice
Annals 4 No. 10, 2004 pages 147-153
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abstract The use of composite alloy layers on chosen surfaces of cast makes possible to obtain a special usable properties. Composite alloy layers on cast steel shapes with liquid phaze. The processes which set in form during formation of composite layer, progress beside the transient heat flow that the transient thermal field. Decrease of temperature in surface layer of cast causes gradual stopage of these processes. Their intensity depends from conditions of self-coolings of the cast in form and has decisive influence on the composite consolidation of chosen cast steel surfaces. The aim of these investigation was to obtain the mathematical model of heat flow and computer simulation of the solidification and self-cooling processes in time of formation the composite alloy layer on spherical cast (Figs. 1-3). This shape permits to make an assumption that the heat flow has one - dimensional character, and gradient has only ones component. The system of cast-composite plug-form was analysed in spherical coordinates. It was considered three diameters of spherical casts (60, 80 and 100 mm), three thicknesses of composite layers (2, 3 and 4 mm) and three pouring temperatures (1550, 1600 and 1650oC). Key words: composite, composite alloy layers