Method for the preparation of thixotropic slurries

摘要

The invention relates to an improved method for the preparation and delivery of semi-solid thixotropic metal slurries for use in metal forming processes such as the rheocast and thixocast processes. The method includes inducing turbulent motion within the metal during solidification by electromagnetic or electrodynamic techniques under controlled temperature conditions so as to produce a highly fluid semi-solid slurry with a degenerate dendritic structure comprising solid spheroids dispersed in liquid. In the method of the preferred embodiment of the present invention, flow of the thixotropic metal slurry from the vibrating chamber is controlled by electromagnetic techniques and may be continuous or semi-continuous.