Nodularizer is an alloy additive that can promote the graphite form in cast iron to become spherical, which can improve the toughness and strength of ductile iron, reduce casting defects, and improve product quality. is an important auxiliary agent widely used in industrial production.

 In China the most commonly used nodularizer is Rare Earth Ferro Silicon Magnesium Nodulizer (FeSiMg), which is mainly composed of ferrosilicon, calcium, magnesium, rare earth and so on by melting configuration. The spheroidizing agent can play a strong deoxidation, desulfurization effect in the process of steel casting, and has a good effect on the fluidity of molten iron.

FeSiMg nodulizers are primarily used in foundries producing ductile iron castings for automotive, machinery, and other industrial applications.

1. Promote the graphitization: can promote the nucleation and growth of graphite, increase the number and size of graphite, so as to improve the performance of cast iron.

2. Reduce the tendency of white mouth: can react with sulfur, oxygen and other elements in iron water to generate spheroidal compounds, reduce the content of sulfur, oxygen and other elements, reduce the tendency of white mouth.

3. Improve the fluidity: can react with the silicon element in the iron water to generate magnesium-silicon alloy, which improves the fluidity of the iron water and reduces the dross, bubbles and other defects in the pouring process.

4. Purification of iron: has strong reducing and oxidising properties, which can react with the impurities in the iron to remove the harmful elements such as sulfur and oxygen, and improve the purity of iron.

5. Improvement of organisational structure: can improve the organisational structure of cast iron by controlling the composition of the iron and cooling speed and other parameters to improve the strength, toughness, abrasion resistance and corrosion resistance and other properties of cast iron.