Calcium-silicon cored wire is a highly important secondary refining material in modern steelmaking and foundry industries. Simply put, it can be described as a "specially designed alloy wire": an outer steel strip tightly wrapped around calcium-silicon alloy powder inside. Using specialized wire feeding equipment, it can be accurately injected deep into the molten steel, thereby efficiently improving steel quality. With its innovative "steel strip-wrapped alloy powder" design, it addresses multiple challenges of traditional deoxidation and desulfurization processes, making it an essential tool in the production of high-quality steel.
Product Nature and Core Advantages
Product Structure: Calcium-silicon alloy powder (usually containing 28-30% Ca and 55-60% Si) is encapsulated in a low-carbon steel strip to form wires with a diameter of 10-13mm.
Core Advantages:
| Advantage | Specific Performance |
|---|---|
| Surge in Yield | The recovery rate of calcium increases from 1-3% in traditional bulk addition to 10-30% with cored wire feeding, and can reach 35-40% with precise feeding control |
| Precise Component Control | Enables accurate control of addition amount (error < 5%), allowing for fine-tuning of molten steel composition, especially suitable for adding trace elements like B and Ti. |
| Mild and Controllable Reaction | Avoids violent agitation of molten steel, reduces secondary oxidation, and significantly improves operational safety. |
| Reduced Overall Cost | Alloy consumption is reduced by 30-50%, slag volume is decreased by 15-20%, slag skimming frequency is lowered, and solid waste treatment costs are cut by 10-15% |
| Automation Compatibility | Simple equipment, small footprint, and can be integrated into existing steelmaking automation systems. |
II. Core Functions: "Triple Purification" of Molten Steel
1. Strong Deoxidation
Creates conditions for subsequent refining and improves steel cleanliness.
2. High-Efficiency Desulfurization
Calcium has a strong affinity for sulfur, forming CaS (melting point 2450℃) with a desulfurization efficiency of 40-50%
Significantly reduces the hot brittleness of steel and enhances its processing performance
3. Inclusion "Transformation"
Its most valuable function: converting harmful angular Al₂O₃ inclusions into spherical calcium aluminate
This "morphological revolution" enhances steel isotropy, increases fatigue strength by over 30%, and reduces continuous casting nozzle clogging by over 50%.
Overall, calcium-silicon cored wire is a high-efficiency metallurgical material that can significantly improve steel quality and reduce production costs. It is particularly suitable for steelmaking and casting scenarios that have high requirements for steel purity, toughness, and processing performance.
When selecting and using it, you can refer to the following suggestions:
Clarify Requirements: If there are stringent requirements for the hydrogen content in steel, special attention should be paid to the product's moisture-proof packaging or consider using improved types of calcium-silicon cored wire with moisture-resistant structures.
Clarify Requirements: If there are stringent requirements for the hydrogen content in steel, special attention should be paid to the product's moisture-proof packaging or consider using improved types of calcium-silicon cored wire with moisture-resistant structures.
Choose a Reliable Supplier: With numerous suppliers in the market (such as Anyang Jintong Metallurgical Refractory Co., Ltd.), selecting products with stable composition and reliable quality is crucial.
