The macrosegregation is one of the most recurrent phenomena in continuous steel casting
of slabs. It often impedes the further processing and has detrimental effect on the quality of rolled
strip. The macrosegregation can be explained by the interpretation of unit steps of solidification in
continuous casting slabs as well as on the basis of the interaction of the inclusions at the interface of
solid and liquid phases. Development of solid shell and interaction between growing dendrites and
MnS segregation has been presented. Only the pushing effect could be the real cause of MnS
segregation among the three possible interactive mechanisms. The sulphur print could give
misleading information on sulphur segregation.
Two computer programs were used for simulation of continuous steel casting processes in frame of this work. In the same time industrial experiments by isotope technics were carried out for observation of solidification and shell thickness. The comparison of calculations and experimental results mutually verified the applicability of methods for more sophisticated control of continuous casting procedure.
The TEMPSIMU program is very useful for evaluation of the effect of casting parameters, and by this way gives a tool for development of technology. The casting speed and overheating effect was investigated on shell thickness, surface temperature and liquid pool length and, as a consequence, macro segregation and quality parameters, furthermore it has a direct effect on productivity. Besides the modified secondary cooling system effects was investigated on solidification.
The TEMPSIMU program is very useful for evaluation of the effect of casting parameters, and by this way gives a tool for development of technology. The casting speed and overheating effect was investigated on shell thickness, surface temperature and liquid pool length and, as a consequence, macro segregation and quality parameters, furthermore it has a direct effect on productivity. Besides the modified secondary cooling system effects were investigated on solidification.
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