TITLE:
Macrosegregation Quality Criteria and Mechanical Soft Reduction for Central Quality Problems in Continuous Casting of Steel
AUTHORS:
Mostafa Omar El-Bealy
KEYWORDS:
Continuous Casting of Steel, Macrosegregation, Centerline Segregation, Macrosegregation Quality Criteria, Mechanical Soft Reduction Technique
JOURNAL NAME:
Materials Sciences and Applications,
Vol.5 No.10,
August
29,
2014
ABSTRACT: In order to study the
central quality of continuously cast tool steel slabs, the simple model has
been developed to simulate the macrosegregation quality criteria. The model
calculates different quality criteria such as average macro-segregation level
criterion “ASL”, its
fluctuation level “FSL” and its
segregation quality number “SQN”.
These criteria are calculated based on the previous measurements of carbon and
sulfur concentrations distributions in final region of spray zones and
centerline area of lower and upper slab sides. The effect of mechanical soft
reduction Technique “MSR” on the slab centerline quality is examined and
analyzed. The model results show that MSR affects the quality of centerline
areas significantly by different ways based on the casting speed. The
experimental and theoretical results clarify that the qualities of different
slab sides are different for all collected samples. The model results show also
that the accuracy of the macro-segregation quality criteria increases
quantitatively with increasing the number of analyzed segregated elements.
Therefore, the macrosegregation quality criteria and their distributions can be
considered as the most simple and vital tool to evaluate the various slab
qualities. Finally, the mechanism of centerline segregation formation with mechanical
soft reduction is discussed in this study.