Hot tear segregations as quality decisive factor for advanced steel ...

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Macro- and Mesosegregations in ContinuousCasting of Slabs: Hot Tear SegregationSubsurface-off-corner cracksTriple-point cracksHalfway „cracks“,transversalHalfway „cracks“, longitudinalIlie, S.; Reiter, J.; Fluch, W.; Presslinger, H.; and C. Bernhard:6th European Continuous Casting Conference, June 4-6 2008,Riccione, Italy, S. Paper – 122PRICM8 Bernhard 11Outline of presentation Advanced steel grades: A challenge for processmetallurgists Macro- and mesosegregation in continuous casting On the nature of hot tear segregations: Formation andconsequence on product quality Physical simulation of HTS-formation Numerical prediction of HTS-formation in slab casting:Concept and example Summary
On the nature of hot tear segregations (HTS) HTS form during solidification inconsequence of an overcriticalstraining of the columnarsolidifying shell. HTS do not form betweendendrites, as commonly attributed,they form mainly along primarygrain boundaries.PRICM8 Bernhard 13 Formation of a hot tear segregation (HTS)Pierer, R. and C. Bernhard: AISTech 2010, Pittsburg, USAPRICM8 Bernhard 14
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