Abstract:
A spheroidal graphite iron (SGI) is widely accepted material for the casting process. It is also
known as graded casting and researcher claims that it is difficult to maintain the proportion of
the elements and its composition. One of the ways to control it in the required way, the microstructural
analysis is becomes necessity. The current research is addressing the impact of
different alloying elements and mould opening time (self-annealing) of SG 400/15 grade cast
iron. The general measures in term of microstructure analysis is nodularity, to maintain its
required counts as per the specific application is depends on the alloying elements and
solidification times and many other parameters. In SGI, nodularity is the strong function of the
mechanical properties of the product. In the current research, the efforts have been made to
establish a relationship between nodularity and proportion of alloying elements including
magnesium, manganese, sulfur, silicon and other important process parameters i.e. pouring
temperature, pouring time and mould opening time.
