Rolling Characteristics in the Twin-Roll Rapid Solidification Process

Abstract

The twin-roll rapid solidification process was investigated both experimentally and theoretically to explore rolling characteristics of the process.
Results of the experiment using a Pb–Sb eutectic alloy show that the thickness of a rapidly solidified metallic ribbon decreases with increasing roll rotation speed and with decreasing initial roll gap and melt flow rate. The cross-sectional area of the ribbon is in proportion to the ratio of the melt flow rate to the roll rotation speed and does not depend on the initial roll gap.
Based on the reduction ratio in thickness of the solidified ribbon and the roll gap enlarged by a rolling load, effects of key process parameters on the ribbon geometry are discussed. The calculated roll separating force has been confirmed to agree well with the observed value.