Flow Patterns in Mold for Preventing Longitudinal Cracks on Peritectic Steel Grades
(Room 205B)
09 May 17
2:00 PM
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2:30 PM
Numerical models have been conducted to understand the effects of fluid flow and temperature distribution in the appearance of longitudinal cracks in peritectic steel grades. Computed fluid flow patterns and temperature distributions delivered by different SEN designs have been correlated with data from the plant. Asymmetric flow patterns in the mold lead to the occurrence of longitudinal cracks at transient events during the operation, such as changes in casting speed, superheat or SEN swaps, and even at steady operating conditions. SEN features such as excessive positive ports angle and cup bottom on the bore body increase the chances for developing longitudinal cracks. A reduced ports angle and pyramid bottom on the bore of the SEN resulted in a more uniform fluid flow and temperature distribution near the meniscus region.