Semi-solid processing of cast iron

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