Numerical Modeling of a Spin-Casting Process

In this paper, numerical modeling of heat transfer in a spin-casting process is analyzed. Effects of interface heat-transfer coefficient. undercooling and finite ribbon thickness on the solidification behavior are considered. The results are compared with analytical solutions of similar conditions. The temperature distribution across the wheel and ribbon is examined. In spin-casting of TiAl ribbon on a Mo wheel, the solid/liquid interface velocities in the range of 0.1–1.0 m/s and cooling rates in the range of 1–5 × 10⁵°C/s are obtained. In the presence of undercooling, the solid/liquid interface velocity increases to 10 m/s. Moderate to high undercooling results in partial remelting of the ribbon.