Response analysis of a continuously-cast billet under the impact vibration of the solidification end

Abstract

The heat transfer calculation and the modal analysis of a 0.15 m × 0.15 m continuously-cast billet were carried out in this study. At the position of 44% linear liquid phase ratio, the results show that only for the first and sixth order modes, the displacement amplitude is in the same direction as the inner and outer arcs. Based on the first-order mode, impact vibrations are applied to the outer arc of the billet, and the impact vibrations do not damage the billet when the impact velocity v ≤ 12 m/s or the impact acceleration a ≤ 800 m/s². It was found that the response of the stress on the shell was in the form of an “n-shaped” distribution under different condition vibrations. Meanwhile, it has been confirmed by experiments that large impact kinetic energy and impact momentum can improve central segregation and shrinkage porosity, respectively.