Silicon strontium inoculant

Silicon strontium alloys are mainly used as casting inoculants. Strontium is an effective element to promote inoculation in ferrosilicon inoculants. When the degree of supercooling is large, strontium has a special effect of reducing the number of eutectic clusters, which can reduce the shrinkage cavity and dispersed shrinkage of castings.

It is suitable for thin-walled or chilled high-sulfur and low-sulfur gray castings with strong graphitizing ability. It is also used in ductile iron to increase the number of nodular graphites, especially high-nickel corrosion-resistant ductile iron (containing Ni14%, Cu6%, Cr2% ,Si1.5%). In addition, because it reduces chilling and does not significantly increase the number of eutectic clusters, it is especially suitable for gray castings that require dense castings without looseness and water pressure resistance. Different from strong carbon-silicon-calcium graphitizing inoculants, it allows low temperature of molten iron, with low content of calcium and aluminum, less slagging, and no pinhole defect in castings.

Ladle-pour-over: the amount of addition is 30% less than that of ferrosilicon, and it can be increased appropriately for gray cast iron (about 0.1-0.3% alloy cast iron). The allowable range of inoculation temperature is 1360-1460°C, generally 1400-1600°C.

The inoculant should be added to the metal stream into the ladle. Do not add the inoculant on the surface of the molten iron or place the inoculant at the bottom of the ladle. The added particle size and precautions are the same as those of ferrosilicon.

It is supplied in 0.2-0.8mm, 0.5-2mm, 1-10mm, 3-10mm particle sizes and 25kg woven ladles, or in 1 ton or 0.5 ton big ladles, plastic woven ladles (tons), and can also be supplied according to user requirements.