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Determination of high temperature surface crack formation criteria in continuous casting and thin slab casting
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Determination of high temperature surface crack formation criteria in continuous casting and thin slab casting

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This ECSC project was aimed at developing strategies to eliminate surface cracking, both in continuous slab casting and thin slab casting. The work combined laboratory studies, mathematical modelling and industrial trials in a multinational collaboration between MPI, Dillinger Huttenwerke, Rautaruukki Oy, ThyssenKrupp Stahl and IRSID. The extensive investigations of surface quality on as-cast products carried out within the project have contributed to a better understanding of surface cracking and oscillation mark formation, in relation to process parameters, such as casting speed and oscillation parameters. Thanks to laboratory tests carried out at TKS and IRSID, as well as thermomechanical modelling of industrial continuous casters made by MPI, new strategies to avoid surface cracking have been proposed and implemented: - intensive cooling pattern on Dillingen CC5 ; - oscillation strategy with non-sinusoidal mode, high frequency and stroke, on Rautaruukki CC6. These new process conditions have proven so far to be beneficial for surface quality.
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