Abstract
Compacted vermicular graphite cast irons including different amounts of pearlite were cast to attain a relation between the amount of pearlite and the mechanical properties. Ferritizing annealing and pearlitizing normalizing were also tested to improve the ductility. The tensile and impact properties depend on the amount of pearlite in the matrix. A transition phenomenon is found at the pearlite content about 40%. The graphite morphology also depends on the structure of the as-cast matrix. Both the graphite morphology and the matrix structure shall be examined prior to the heat treatment to control the ferritic or pearlitic matrix by heat treating.
