On the Formation of Centreline Segregation in Continuous Slab Casting of Steel due to Bulging and/or Feeding

• DOI: 10.1002/srin.201000122
• Publication Date: 2010-08-13T00:32:18Z
• Authors: F. Mayer; M. Wu; A. Ludwig
• Keywords: Shrinkage; Slab

Abstract Centreline macrosegregation is often observed in continuous slab casting of steel. Two the main formation mechanisms are bulging and feeding. Both were studied compared current work by using a two‐phase volume averaging model considering only columnar solidification. The strand itself modelled applying predefined velocity following speed solid shell deformation (e.g. bulging). Three different cases simulated discussed. (i) first case considers influence feeding flow during solidification without taking into account. Negative centre this case. (ii) second takes caused series along solidifying account, is, therefore, representative for an ideal situation where place shrinkage. In positive centreline segregation found. (iii) last shows results simulation which combines both shrinkage‐ bulging‐induced flows. It found that under conditions effect dominates over shrinkage effect, so predicted.