Cast iron transformation – inoculation

What is the inoculation process all about?

Inoculation: treatment conducted on base cast iron to guarantee a first transformation through an heterogeneous nucleation process adding in small quantities substances such as carbides, nitrides and oxides (nucleating agents).

Why carry out an inoculation treatment on your cast iron ?

Through inoculation, formation of various little developed crystals is allowed and consequently the mechanical characteristics are enhanced without substantial alteration of the chemical composition.

Moreover, through such treatment, the dimensions of the grain of the structure are reduced and more precisely they are sharpen in case an heterogeneous non-metallic phase is present and it is not workable through any other type of processing such as plastic processing or thermal processing.

How is it possible to monitor the efficiency of the inoculation treatment of cast iron?

It is possible to monitor the efficiency of the inoculation treatment through dedicated equipment used directly in the production department such as the
thermal analysis software for cast iron TCAST that provides a real time analysis of the quality of the metal and it takes into account the treatments done on the liquid cast iron.-

As an integration to such monitoring system there is as well the Cored wire system technology. A cored wire with a specific chemical composition is injected directly in the ladle thanks to a dedicated machinery. Targeted chemical composition, speed of injection of the wire and wire position inside the ladle are kept constant ensuring reliability and precision of treatment over time.

How do you inoculate to ensure the best cast iron transformation?