In this work there is presented the way how to improve the utility properties of steel cast by alloy layers application (on the base of alloy FeCrC) directly during the process of casting. The way how to forecast the thickness of the surface alloy layer on the cast with the use of simulation program Fluent was described. Computer simulation was conducted to forecast the distribution of particular elements on cross section of the cast. Thanks to it, it was possible to determine the thickness of obtained layer. The aim of the researches was also the analysis of conducted simulations of alloy layer forming process. There was the attempt to determine the influence of the geometry of the connection surface metal/pad and the grain size (of the pad from FeCrC) on their runs. Thanks to the analysis of obtained results, it was said that it was possible to forecast initially the distribution of the particular elements on the section cast- surface alloy layer and determine the virtual thickness of the layer with the use of Fluent program.Keywords: Casting, cast steel, alloy layer, simulation
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