A thermal analysis of thin strip steel casting has been conducted for planar flow casting. For a given strip thickness, the interface heat transfer coefficient, hi, has the most significant influence on average cooling rate ξavg (C/sec) and local solidification time tf. As a result, hi affects the as-cast structure and its properties. However, other factors such as melt superheat and initial substrate temperature have distinct but smaller effects on ξavg and tf. In addition, a decreasing hi makes initial isotherm movement slower and increases the delay time needed for the formation of certain types of segregation. Owing to a variation of local solidification time tf (because of cooling from one side only) there is a likely gradient of micro-structure across the thickness resulting in property variation through the steel strip thickness.
A Mathematical Model for Thermal Analysis of Thin Strip Casting of Low Carbon Steel
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Kim, Y., Farouk, B., and Keverian, J. (February 1, 1991). "A Mathematical Model for Thermal Analysis of Thin Strip Casting of Low Carbon Steel." ASME. J. Eng. Ind. February 1991; 113(1): 53–58. https://doi.org/10.1115/1.2899622
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