What Is CaFe Cored Wire? What Is The Price Of CaFe Cored Wire?

What is calcium-iron core wire?

Calcium-iron core wire is a metallurgical material used for steel refining, made by wrapping calcium-iron mixed powder with cold-rolled steel strips. It is primarily used to optimize the cleanliness of molten steel and the performance of continuous casting processes. Here is a detailed explanation of its core features:

Outer shell: Cold-rolled steel strip with a thickness of 0.35–0.5 mm, tightly wrapped, high tensile strength, good toughness, and reduced calcium oxidation loss.
Core Material: A mixture of calcium particles (25–35%) and iron powder (65–75%), with calcium content primarily at 30% or 40% (e.g., Ca30, Ca40 specifications), and particle size ≤1 mm.
Product Specifications: Diameter 13±0.8 mm, core powder mass 220–250 g/m, and fewer than 2 joints per kilometer.

Seamless cold-rolled forming ensures the steel strip tightly wraps the powder, reducing calcium volatilization, with a storage life of over 6 months.
Compared to pure calcium wire, calcium-iron wire is more cost-effective (reducing ton-steel costs by over 10%) and compatible with existing wire feeding equipment.

What is the function of CaFe cored wire?
🔥 1. Deep purification of molten steel
Deoxidation and desulfurization: Calcium has strong affinity with oxygen/sulfur, forming low-melting-point CaO and CaS that float to the surface, achieving a desulfurization rate >30% and reducing oxygen content in molten steel to ≤8 ppm.
Modification of inclusions: Converts elongated sulfide particles (e.g., MnS) into spherical CaS, improving steel anisotropy and enhancing fatigue resistance.
⚡ ‌2. Optimizing continuous casting process‌
Preventing nozzle blockage‌: Modified high-melting-point Al₂O₃ into liquid calcium aluminate reduces continuous casting nozzle blockage rate by >80%.
Improving fluidity‌: Enhances steel liquid pourability, reducing surface defects in cast ingots (such as cracks and inclusions).
💰 ‌3. Economic and environmental benefits‌
High element recovery rate‌: Calcium recovery rate of 8–15% (traditional silicon-calcium wire only 5–10%), reducing calcium consumption per ton of steel by 20–30%‌.
Dust-free operation‌: Closed feeding reduces dust dispersion by 85%, improving workshop environment‌.

What are the applications of calcium-iron core wire?

Low-carbon, low-silicon steel grades‌

SPHC steel, electrical steel: Avoids silicon content exceeding limits caused by aluminum final deoxidation, with calcium treatment costs 10–15% lower than pure calcium wire.
Ultra-pure steel: Controls inclusion morphology to meet high surface quality requirements for automotive sheets, bearing steel, etc.

Continuous casting process optimization

Intermediate ladle calcium treatment stabilizes the casting process and reduces casting interruptions.

Special metallurgy

Inclusion plasticization treatment for stainless steel and bearing steel to enhance corrosion resistance and fatigue strength.

⚖️ What are the comparative advantages of calcium-iron core wire (vs. pure calcium wire)?

🔬 Production process and quality control of CaFe cored wire
Seamless cold rolling technology
Steel strip pre-forming → calcium-iron powder filling → cold rolling wrapping → rewinding, core powder filling density error ≤ ±2%.
Rapid testing method‌
Cut a wire segment, weigh it, and calculate the calcium content: (total weight – steel strip weight) / segment length × calcium purity‌.

What is the value of calcium ferro cored wire?
Efficient purification‌: Desulfurization rate > 30%, inclusion modification rate > 80%, improving the purity of molten steel‌;
Cost-effective: Ton-steel cost is over 10% lower than pure calcium wire, suitable for low-carbon, low-silicon steel refining requirements;
Green manufacturing: Dust-free feeding process promotes metallurgical environmental upgrades.
Its technical maturity has made it the mainstream choice for medium- and low-carbon steel refining, especially suitable for production lines with high requirements for continuous casting stability.