Vliv technologických parametrů plynulého odlévání oceli na makro a mikrostrukturu ocelí určených ke kování

Abstract

The PhD thesis is focused on the macrosegregation behaviour of carbon during the solidification of steel for forgings in the continuous casting machine. The work is divided into several parts. The first part contains a detailed analysis of literary sources about the formation of the macrosegregation structure with emphasis on the influence of electromagnetic stirring. On the basis of theoretical information, a series of experiments were performed to describe the formation of the macrosegregation morphology in detail in the dependence on the process parameters for the specific conditions of the continuous casting and to find the optimal parameters of the electromagnetic stirring regarding to the further use of the as-continuously cast billets. The result is to improve the knowledge of the influence of the electromagnetic stirring in the mould on the distribution of segregating elements throughout the cross section of round bloom, to define important criteria for determining the severity of the macrosegregation arrangement on the properties of the final products and refine the literary knowledge of the processes during the solidification process.