Product Description
Calcium silicon barium inoculant is a composite alloy inoculant primarily composed of silicon (Si), barium (Ba), and calcium (Ca) as core elements, manufactured in the form of iron alloy blocks or granules.
It is a long-acting composite inoculant and one of the most commonly used high-efficiency inoculants in the casting of gray iron and ductile iron.
Main Functions
1. Graphite Refinement
Makes the graphite in cast iron finer, more uniform, and rounder, reduces coarse graphite, and improves the density of castings.
2. Prevention of White Cast Iron
Silicon-barium-calcium inoculants effectively suppress the formation of white cast iron structure at the edges and in thin-walled areas of castings, preventing hardness, brittleness, and machining difficulties.
3. Reduction of Shrinkage and Porosity
Silicon-barium-calcium helps improve molten iron fluidity, reducing internal shrinkage cavities, porosity, and pinholes in castings, thereby increasing the casting yield.
4. Long-lasting inoculation and resistance to decay
The synergistic action of barium and calcium ensures a long-lasting inoculation effect with slow decay, making it suitable for extended pouring times and thick, large castings.
5. Improved mechanical properties
It enhances the strength, hardness, toughness, and wear resistance of cast iron, while improving machinability.
Scope of Application
- Grey cast iron (machine tools, housings, molds, pipe fittings)
- Ductile iron (crankshafts, wheel hubs, construction machinery castings)
- Vermicular graphite cast iron, thin-walled high-strength cast iron
- Various castings requiring high inoculation efficiency and stability
FAQ
Q: What is the primary function of silicon-barium-calcium inoculant?
A: It refines graphite, reduces white cast iron, and improves the strength and toughness of castings.
Q: For which castings is silicon-barium-calcium inoculant used?
A: It is primarily used in gray cast iron and ductile iron, such as pipe fittings, machine tools, and engine castings.
Q: What is the difference between silicon-barium-calcium inoculants and ordinary ferrosilicon inoculants?
A: They contain higher concentrations of barium and calcium, providing longer-lasting inoculation effects with slower degradation.
Q: What precautions should be taken when using them?
A: Control the dosage and timing of addition; use immediately after mixing and avoid moisture absorption.
Q: How can you determine the quality of an inoculant?
A: It should have uniform composition, low impurity levels, appropriate particle size, and consistent inoculation performance.
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