Essential Properties Of Calcium Silicon Cored Wire

Application: spheroidizing wire/ inoculation wire/ spheroidizing cored wire/ casting steelmaking.

Packing method: horizontal and vertical, the cable can be divided into internal tap and external type.

Calcium silicon cored wire is an important additive delivery medium in the metallurgical industry, mainly used for deoxidation, desulfurization and inclusion control in the steel smelting process. This product wraps a specific proportion of calcium silicon alloy powder in a steel strip to form a continuous wire material, which is accurately added to the molten steel through a special wire feeder to achieve optimal control of metallurgical reactions.

Calcium silicon cored wire consists of two parts: the outer skin and the core material. The outer skin is usually made of low-carbon cold-rolled steel strip, which is formed into a U-shaped or slit groove through multiple rolling processes, and then the calcium silicon alloy powder with a precise ratio is filled into it. Finally, the steel strip is closed and rolled through a forming unit to form a continuous wire with uniform diameter. The key to the production process is to ensure the filling rate, straightness and mechanical strength of the cored wire so that it can pass through the wire feeding equipment smoothly without breaking or powder leakage. The raw materials need to be strictly screened during the production process. The particle size and chemical composition of the calcium silicon alloy must meet the standards, and the thickness and width of the steel strip must also be precisely controlled. Modern cored wire production lines are usually equipped with automatic weighing systems, high-frequency welding equipment and online detection devices to ensure the consistency and stability of product quality.

The main functions of calcium silicon cored wire in molten steel are reflected in three aspects: deoxidation, desulfurization and inclusion morphology control. Calcium has a strong affinity with oxygen and can effectively reduce the dissolved oxygen content in steel; at the same time, calcium reacts with sulfur to form high-melting calcium sulfide, reducing the effect of sulfur on the hot brittleness of steel. Silicon acts as an auxiliary deoxidizer and helps to adjust the redox state of molten steel.

When the cored wire enters the molten steel, the outer steel skin melts rapidly, releasing the calcium silicon alloy inside. Under the action of high temperature, calcium partially vaporizes to form bubbles. These tiny calcium bubbles fully contact the molten steel during the rising process, greatly increasing the reaction interface area and making the metallurgical reaction more thorough. Silicon dissolves in the molten steel, participates in the deoxidation reaction and adjusts the chemical composition of the steel.

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