Description
Inoculants are used to control solidification in cast iron.
Based on the search results, “IMSR” refers to a family of Strontium-bearing (Sr) ferrosilicon-based inoculants used in the foundry industry to treat cast iron. These products are designed to enhance nucleation, reduce chill, and improve the graphite structure in both grey and ductile iron.
Key Features of IMSR-type Inoculants:
- Composition: They are generally based on 75% ferrosilicon (FeSi) with the addition of strontium (Sr).
- Purpose:
- Chill Reduction: They are highly effective at reducing chill in thin sections, often allowing for lower usage rates compared to standard ferrosilicon inoculants.
- Graphite Control: They promote the formation of Type A graphite in grey iron.
- Nodulizing: In ductile iron, they help achieve high nodule counts and reduce carbide formation.
- Performance: Research indicates that IMSR 75 (FeSi-Sr) can produce a high number of eutectic cells, leading to better microstructure and mechanical properties.
- Application: These are typically added to the ladle or stream during the iron casting process.
Related Information:
- IMSR 75: Frequently cited in studies comparing inoculants for grey iron,, showing superior performance in increasing the number of eutectic cells per mm².
- IM22A (FeSi-Ba-Sr): A related variant that combines barium and strontium for inoculation.
- Suppliers: These types of inoculants are supplied by companies such as Miller and Company and are sometimes associated with specialized foundry product portfolios
