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The aim of this study is to define the optimal working conditions for the continuous casting ingot mould vis-à-vis the cleanness in terms of the lack of inclusions of the cast slabs. This is done by looking at the relationship between the hydrodynamic state of the liquid steel and the end quality of the sheet metal, used mainly in the car industry. Since there is little likelihood of inclusions decanting in the mould, improvements must be made in the hydrodynamic state of the cast slabs' liquid phase to reduce or remove subcutaneous or internal inclusions. In order to examine the workings of the mould in industrial conditions a hydraulic simulation model was developed. Numerical simulations were then carried out with the help of Phoenics software. Finally an analysis of the experimental and numerical results lead to four main criteria to describe the outflow in the mould and which take into account the main physical phenomena in question. These criteria concern: the depth of penetration of the nozzle, the speed of circulation of the metal at the level of the meniscus, deformation of the meniscus, and the temperature of the liquid around the meniscus. The criteria can be used to compare different casting conditions, and be used as a guide to optimize the working of the mould.

Additional information

Bibliographic Reference: EUR 18652 FR (1998) 53pp.
Availability: Available from OOPEC Sales agents
ISBN: ISBN 92-828-5153-2
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