
Calcium-Aluminum Cored Wire
Manufacturer of alloy cored wires with 20 years of expertise
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he double-layer calcium-aluminum cored wire consists of metal calcium wire wrapped with aluminum strip and steel strip, forming a dual-layer protective structure. It is primarily used in the steel smelting process to enhance steel properties, increase calcium recovery rates, regulate the content of easily oxidized elements and trace elements, and purify molten steel by modifying the composition and morphology of inclusions. Additionally, it helps control reaction speed, prevent molten steel splashing, and facilitate calcium-aluminum composite deoxidation, achieving deep deoxidation.

Chemical Composition and Specifications
Ca > 96%, Al > 98%
Mg < 1.0%, Si < 0.1%, Fe < 0.5%, H₂O < 0.5%
Diameter: 9mm
Iron sheet thickness: 0.5-0.65mm
Aluminum layer thickness: 0.4-0.9mm
Core material weight: 220g/m (calcium: 50g/m, aluminum: 20g/m)
Metal calcium wire diameter: 5-8mm
Aluminum strip layer thickness: 0.7-1mm
Advantages of Double-Layer Calcium-Aluminum Cored Wire
High Strength & Efficient Calcium Utilization
The aluminum strip layer wrapping the calcium wire allows the core material to penetrate deep into the molten steel before calcium vaporizes, leading to higher calcium recovery rates.
This prevents excessive calcium burning and reduces steelmaking costs.
Pre-Deoxidation with Aluminum for Improved Purity
The aluminum strip pre-deoxidizes the molten steel, increasing its purity before calcium fully reacts.
This process effectively removes oxygen impurities, further enhancing steel quality.
Optimized Composition Control
Compared to calcium-iron cored wire, the calcium content in the middle layer of calcium-aluminum wire is more stable (fluctuating between 0.0001% and 0.0002%).
The actual cost of calcium treatment can be reduced by approximately 6 yuan per ton.
Compatibility with Existing Equipment
The composite calcium-aluminum cored wire can be used without modifications to existing wire feeding equipment, allowing for seamless integration into current production lines.
Applications
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Deoxidation
Calcium and aluminum serve as efficient deoxidizers.
Aluminum forms stable oxides, effectively reducing oxygen content in steel.
Desulfurization
Calcium, with its strong reducing properties, reacts with sulfur in molten steel to form calcium sulfide (CaS), thereby lowering sulfur levels.
Molten Steel Purification
The calcium-aluminum cored wire enhances molten steel purity, improving mechanical and processing properties.
Inclusion Modification
Alters the composition and shape of inclusions, making them more spherical.
Reduces their negative impact on steel properties, improving strength, toughness, and corrosion resistance.
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