Semi-Solid Processing of Cast Iron

Abstract

Semi-solid processing of alloys is becoming one of the key technologies for producing advanced materials. The present study aims to clarify mould filling characteristics and solidification structure in semi-solid processing of gray iron. The results indicate that the apparent viscosity and primary particle morphology have pronounced effects on the filling ability of semi-solid slurry. The particle segregation in the solidified sample is observed between the upper and lower part of the sample and is shown to decrease with the increase of stirring in semi-solid state. Finally semi-solid processed cast iron with the radial change of both the microstructure and mechanical property is obtained under the centrifugal effect acting on liquid/solid slurry.