Correlation between the continuous casting parameters and secondary dendrite arm spacing in the mold region

Abstract

In this article, a mathematical model for cooling rate (CR) in the mushy zone based on the local heat flux density in the mold region was introduced. This model takes into account the parameters of continuous casting in the mold region such as mold level (ML), mold frequency (s), mold thickness (dm), flow rate of cooling water (Q), casting velocity (VC) and viscosity of the mold powder (η). This model was applied to estimate secondary dendrite arm spacing (SDAS) by the analytical model of Thomas–Won. Comparison between the measured and calculated SDAS confirmed the model validity. The results revealed that, increasing VC, Q, fs and η, leads to decreasing the SDAS, increasing the dm increases the SDAS and ML no affect the SDAS. Also, the most effect is related to the viscosity of the mold powder.