1. Basic Composition
Primary elements: Silicon (Si), Calcium (Ca), Barium (Ba), with iron (Fe) as the base.
Typical composition range (adjustable per application):
Silicon (Si): 30-60%
Calcium (Ca): 10-20%
Barium (Ba): 5-15%
Iron (Fe): Balance
Trace elements: Aluminum (Al) ≤1.5%, Carbon (C) ≤0.5%, etc.
2.Core Functions
(1) Efficient Deoxidation
Ca/Ba exhibit extreme affinity for oxygen, forming low-melting-point oxides (e.g., CaO·BaO·SiO₂) that float into slag.
Advantage: Reduces inclusions, enhancing steel purity.
(2) Deep Desulfurization
Forms stable sulfides (CaS, BaS), significantly lowering sulfur content.
Effect: Improves steel toughness and processability.
(3) Inclusion Modification
Transforms high-melting-point inclusions (e.g., Al₂O₃, SiO₂) into low-melting-point calcium aluminates/silicates for easy removal.
Result: Minimizes fatigue cracks, extends service life.
(4) Microalloying
Residual Ca/Ba refine grain structure, boosting strength and corrosion resistance.
3. Key Applications
Steelmaking:
Specialty steels: Bearing steel, pipeline steel, gear steel.
Continuous casting: Prevents nozzle clogging.
Foundry:
Ductile iron: Promotes graphite nodularization (supplements Mg).
Vermicular graphite iron: Optimizes graphite morphology.
Welding: Deoxidizer in electrode coatings.
|
Calcium Silicon index |
||||||
|
model |
Chemical composition(%) |
|||||
|
Si |
Ca |
Al |
S |
P |
C |
|
|
≥ |
≤ |
|||||
|
Ca30Si60 |
60.0 |
30.0 |
2.40 |
0.05 |
0.05 |
1.0 |
|
Ca28Si60 |
60.0 |
28.0 |
2.40 |
0.05 |
0.05 |
1.0 |
|
Ca28Si58 |
58.0 |
28.0 |
2.40 |
0.05 |
0.05 |
1.0 |
|
Ca25Si55 |
55.0 |
25.0 |
2.40 |
0.05 |
0.05 |
1.0 |
|
Ca20Si55 |
55.0 |
20.0 |
2.40 |
0.05 |
0.05 |
1.0 |
|
Ca20Si50 |
50.0 |
20.0 |
2.40 |
0.05 |
0.05 |
1.0 |
4.Product Details


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