Classification of inoculants

Classification of inoculants

(1) Ferrosilicon inoculant. Ferrosilicon inoculants are divided into three types: 45FeSi, 75FeSi, and 85FeSi. The treatment effect of 45FeSi inoculant is poor, and the cost of 85FeSi is higher, and 75FeSi is commonly used. Ca and Al in 75FeSi have a great influence on the inoculation effect, among which Ca has a great influence, and when it is greater than 0.5%, it has a strong ink-forming ability. Generally, 75FeSi chooses the following chemical composition ranges, Si: 74% to 78%; Ca: 0.5% to 1.0%; Al: 0.8% to 1.5%.

(2) Silicon barium inoculant. Silicon barium inoculants are mainly used in the production of gray cast iron and ductile iron. It can significantly increase the number of graphite nodules when used in ductile iron, and can reduce the tendency of white mouth when used in gray cast iron. Refine grains and improve graphite morphology. In addition to high mechanical properties, this kind of inoculant also has strong anti-recession ability. Generally, the inoculant contains Ba between 2% and 3%.