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Ferro Barium Silicon
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Shape:Lump Powder Particles
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Chemical Composition:Ba Si Al Mn C P S
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Size:0~1mm 1~3mm 10mm~30mm 10~60mm 10~100mm .etc
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Package: Ton bag or customized according to customer requirements
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Product Introduction
Ferro Barium Silicon (abbreviated as FeBaSi) is a specialized composite ferroalloy, typically containing 4–12% barium (Ba), 40–60% silicon (Si), and iron (Fe) as the balance. Unlike single-element additives (e.g., ferro silicon, ferro barium) or binary alloys (e.g., ferro calcium silicon), its unique silicon-barium synergy delivers three irreplaceable metallurgical benefits: faster deep deoxidation, efficient desulfurization, and spherical modification of harmful inclusions. This makes it indispensable for producing low-oxygen, low-sulfur steel (e.g., automotive sheet steel, pipeline steel) and high-quality cast iron, solving the pain points of "incomplete deoxidation" and "brittle inclusion-induced defects" in traditional processes.
For barium silicon inoculants, the following three points should be emphasized:
Strong resistance to fading: Barium allows the inoculation effect to last longer (typically 10-15 minutes longer than ordinary ferrosilicon inoculants), making it ideal for large castings or waiting periods during production line downtime.
Elimination of white cast iron structure: Significantly reduces the hardness of casting edges, improving machinability.
Uniform graphite morphology: Makes type A graphite distribution more uniform, increasing the tensile strength of cast iron.
Chemical composition
| Grade | Ba | Si | Fe | Key Impurities (Max.) | Size | Typical Application |
|---|---|---|---|---|---|---|
| FeBaSi 850 | 6–8% | 50–55% | 35–40% | Al≤2.0%, Ca≤1.5%, C≤0.5%, S≤0.05%, P≤0.04% | 5–30mm | Low-alloy steel deoxidation (e.g., Q355ND) |
| FeBaSi 1245 | 10–12% | 45–50% | 38–43% | Al≤1.5%, Ca≤1.0%, C≤0.4%, S≤0.04%, P≤0.03% | 10–50mm | High-sulfur steel desulfurization (e.g., pipeline steel) |
| FeBaSi 460 | 4–6% | 58–62% | 32–36% | Al≤2.5%, Ca≤2.0%, C≤0.6%, S≤0.06%, P≤0.05% | 1–3mm | Cast iron inoculation (e.g., ductile iron crankshafts) |
Critical Note: Ba content determines primary function-high-Ba grades (10–12%) prioritize desulfurization, while high-Si grades (58–62%) focus on deoxidation. Impurity control is critical: Al≤2.0% avoids brittle AlN inclusions, while S≤0.05% prevents "re-sulfurization" of molten steel.
Core Advantages vs. Traditional Metallurgical Additives
FeBaSi outperforms single/binary additives in key metallurgical metrics, directly reducing defects and costs:
| Performance Metric | Ferro Barium Silicon (FeBaSi 850) | Ferro Silicon (FeSi 75) | Ferro Calcium Silicon (FeCaSi 30) |
|---|---|---|---|
| Deoxidation Efficiency | 90–95% (O≤15 ppm) | 75–80% (O≤30 ppm) | 85–90% (O≤20 ppm) |
| Desulfurization Rate | 50–70% (S≤0.008%) | 10–15% (S≤0.03%) | 40–50% (S≤0.012%) |
| Inclusion Modification | Spherical (Ba-Si-Al-O, ≤5μm) | Angular (SiO₂, 5–15μm) | Irregular (Ca-Al-O, 3–10μm) |
| Steel Toughness (–40℃ Impact Energy) | ≥45 J | ≥30 J | ≥40 J |
The main uses are as follows
1
As an inoculant, BaSi alloy is suitable for gray cast iron and ductile iron, and can promote the formation of "A" type graphite into complete graphite nodules.
2
Bariumsilicon alloy can nucleate in a wide temperature range, has strong spheroidization ability and recession resistance, and can effectively prevent the tendency of castings to become white.
3
When ferrobariumsilicon alloy containing 10%-35% barium is used as a deoxidizer in steelmaking, it has high utilization rate and strong desulfurization ability, which is better than silicon-calcium alloy.
4
Adding febasi alloy during the steelmaking process can cause important changes in the nature and distribution characteristics of non-metallic inclusions in steel.
Practical Application
Application scope: Suitable for gray cast iron and ductile iron.
Dosage: Generally recommended at 0.1% - 0.4% of molten iron weight.
Size selection:
* 0.2-1mm: For in-stream inoculation.
* 1-3mm/3-8mm: For ladle inoculation.
FAQ
Q: What is the difference between barium silicon inoculant and calcium silicon inoculant?
A: Barium silicon inoculant has stronger resistance to fading, especially when processing large-section castings, where barium is far superior to calcium.
Q: How should this product be stored to prevent pulverization?
A: It should be stored in a dry, well-ventilated place, avoiding moisture, as moisture can cause oxidation and even pulverization of the alloy surface.
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