The pressure loss and ribbon thickness prediction in gap controlled planar-flow casting process

Adhesion Upon Solidification and Detachment in the Melt Spinning of Metals

“…[9] and predicting x d with Eqs. [5] and [6], it is found that the transition to catastrophic sticking should occur after 20 revolutions for typical casting conditions, consistent with observation.…”

“…The catastrophic adhesion event was attributed by Liebermann to the increase of wheel surface temperature, T s . Equations [5] and [6] substantiate this claim quantitatively. Parameters in these equations are known to be nearly constant except for the parameters T d , T s , and H which are uncertain.…”

“…However, as T s approaches T d , x d rapidly rises toward infinity since the denominator in the log term in Eq. [6] becomes small. This is consistent with catastrophic sticking.…”

“…Interest has renewed recently as applications have broadened. [6] During the conversion of molten metal to final product, the metal transfers thermal energy to the wheel in two sequential quenching processes. During the primary quench, of short duration (10 À3 second), the wheel absorbs latent heat and solid ribbon is formed.…”

“…[5] and [6] with all other parameters held at their typical values, affect sticking distance as shown in Figure 4. There is a sensitive dependence of x d on T d ; changes of less than 100 K (100°C) can result in catastrophic adhesion.…”