| dc.description.abstract | The electroslag remelting (ESR) process, which is used to produce large ingots of high quality, bases on controlled solidification and chemical refinement mechanisms and is essential for the production of high quality steels and alloys designed for aeronautical, reactor chemical or nuclear applications. Due to this, it is indispensable to enable many high technological applications. Since the spreading of the industrial application of the ESR process in the 1960s, scientist and engineers worldwide are trying to deepen their understanding about this process to improve its flexibility, productivity and efficiency. Since the process conditions are very rough and measurements are quite costly, if possible at all, numerical simulation became the investigation tool of choice. Over the time, the models became more detailed and more phenomena could be taken into account. Today we are able to estimate electromagnetic fields, heat transfer, metallurgical flow and dendritic solidification in combination with each other within a macroscopic scale, based on actual physical models combined with the capabilities of numerical computing techniques. Out of this predictions about the influence of varied process control, or the occurring of macrosegregations and other defect types, became possible. In this paper state of the art, recent developments and critical aspects of the modelling of the ESR process will be shown. Common models, their strengths and weaknesses, as well as some possible approaches to presently less considered phenomena will be presented. | nb_NO |
