Resumo

GONZALEZ-RONDON, Yordy  e  RENGEL-HERNANDEZ, José Eduardo. Thermo Fluid Dynamic Behavior of Steel in a Continuous Casting Mold: a review. TecnoL. [online]. 2021, vol.24, n.51, pp.230-262.  Epub 09-Out-2021. ISSN 0123-7799.  https://doi.org/10.22430/22565337.1856.

A review of the literature has been carried out to identify what is known in relation to heat transfer mechanisms, thermo-fluid dynamic behavior, solidification characteristics, factors that influence the origin of defects in steel and the use of strategies that impact on a reduction of the defects that originate, mainly, in the mold of the continuous casting of steel. The methodology consisted of collecting and synthesizing fragmented knowledge, comparing the information found in different sources, and giving a clear and up-to-date answer on the thermo-fluid dynamic behavior of the steel in the casting mold. As a result of this review, it can be concluded that serious defects, such as cracks and depressions, are related to thermomechanical behavior; cracks are associated with turbulent flow, variation in the level of the meniscus, high casting speed and inadequate behavior of the strainer powder, and segregation is related to steel contraction, casting temperature and speed, and heat flow in the contour of the piece. It has also been found that, despite the complexity of the phenomena that occur in the mold, it is possible to achieve the formation of a suitable steel crust and reduce the appearance of defects, performing the actions that promote an adequate adjustment of the parameters of the mold. Furthermore, it is essential to apply mold taper and oscillation practices, nozzle configuration and application of electromagnetic fields, to produce quality steel.

Palavras-chave : Continuous casting mold; industrial steel; solidification of steel; thermo-fluid dynamics; heat transfer.

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