Why Improper Nodulariser Selection Affects Ductile Iron Treatments
In ductile iron production, consistency is everything. Mechanical strength, elongation, fatigue resistance, and machinability all depend on one critical process: proper nodularisation. While many foundries focus on melting practice and pouring temperature, a common yet costly mistake lies elsewhere—improper nodulariser selection. Nodularisers , especially ferro silicon magnesium, play a decisive role in transforming graphite from flake to spheroidal form. When the wrong nodulariser is chosen, ductile iron treatments suffer, leading to defects, higher scrap rates, and unpredictable metallurgical results. This article explains why nodulariser selection matters, how improper choice impacts ductile iron treatments, and what foundries can do to achieve reliable, repeatable outcomes. Understanding Nodularisation in Ductile Iron What Is Nodularisation? Nodularisation is the metallurgical process that converts graphite flakes into spheroidal (nodular) graphite within cast iron. This transforma...