Manufacturing Process for Ductile Iron Castings

The manufacturing process for ductile iron castings primarily involves melting, nodularization treatment, inoculation, pouring, and heat treatment. Among these, nodularization is a critical step; it entails adding a nodularizing agent to cause the graphite to form spheres during solidification, thereby significantly enhancing the mechanical properties of the cast iron. Inoculation further refines the grain structure, improving the density and uniformity of the casting.