The use of inoculant is an important process in the production of cast iron. Essentially, the use of inoculants means rapid cooling of cast iron products to improve their quality. This can be achieved by introducing a fine nodule (less than or equal to 4 microns) of the desired element, which affects the structure of the casting in a specific way. The use of inoculants can help rapid cooling and promote the formation of metastable carbides. It also has a multiplier effect on nodules formation and cell solidification in nodular cast iron. In addition, since the inoculant alloy is rich in silicon, it further contributes to the solidification of iron.
The common inoculants are roughly divided into the following types: ferrosilicon inoculants, SiBa inoculants and CaSi inoculants.
