Modelling Steel Casting on a Continuous Unit

摘要

The paper considers the process of steel casting on a curved type unit of continuous steel casting. A mathematical model of temperature distribution in a bar during casting is proposed. The model consists of the equation of thermal conductivity and boundary conditions depending on the location of the secondary cooling nozzles, the type of nozzles, the flow rate and the temperature of the supplied coolant. The solution of the model equations is carried out by the finite element method implemented in the developed software. The software also provides bar cooling process visualization. Various alternatives of the heat transfer coefficient between the metal surface and the coolant are investigated. In addition, the stress-strain state of the bar in the continuous-casting unit is investigated. The developed software can be used by technologists to select bar cooling modes in the continuous-casting unit, as it allows to predict the appearance of defects. Defects predicting is based on the comparing of the bar crust temperature in a curved region of the continuous-casting unit and the temperature of embrittlement for specified steel grades.