Using metal mold centrifugal casting process the ductile iron based composite with distribution of TiC reinforcing particles in inner surface layer was manufactured. Titanium contents in the samples varied from 0 to 0.91 wt%. The concentration gradients of Titanium carbide particles in the inner surface due to centrifugal force, and their influences on the microstructures and the mechanical properties of the ductile iron based composites were investigated in this study. At position 19 mm under the surface of the cast tube, non-pouring end had the lowest fraction of TiC content and central of the tube had the highest TiC content. However, the cross-section of non-pouring end had the highest TiC content and the cross-section of central of the tube had the lowest TiC content. Average particle sizes of TiC grains in the cast tube were 2-4μm.
Ductile iron based composite Centrifugal casting Metal mold TiC