Papers by Keyword: Continuous Steel Casting

Abstract: The paper presents the results of physical modelling aimed at determining the cracking susceptibility of the selected steel grade under conditions characteristic of the continuous casting process. The material used for investigation was steel grade S355J2G3 [1]. For a study on the physical modelling of the continuous steel casting process, the GLEEBLE 3800 [2, 3], a metallurgical process simulator, was employed. The obtained results allowed establishing conditions for a continuous steel casting process that could cause cracks to form in the material being cast. Research on one of technological conditions for steelworks was carried out taking into account the problem of cracking during rolling in the initial group of the bar rolling mill.

Abstract: The paper presents research carried out in order to obtain thermo-isolating and covering powder used in the Tundish of the continuous casting installations. This powder is made by using different types of waste originating in the iron and steel industry and in the energy industry, such as: thermal power-station ashes, furnace slag, B.C.A. scraps, limestone, black ash, fluorine, raw dolomite, graphite powder. The powder thus obtained must have a faster melting speed and a lower melting temperature; it does not make the steel impure or diminish the heat losses through radiation. An effect of applying the experimental results in industry, besides financial economies, is to obtain an accelerated integration of a technological process in companies, according to European Union requirements regarding the preservation of the environment.

Abstract: 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.

Abstract: 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.