Powdered wire can be more efficiently added to steel or molten iron during the steel melting or casting process. The powdered wire can be inserted into position using specialised wire feeding equipment. When the core skin is melted, the wire can be completely dissolved in the ideal position and undergo a chemical reaction, effectively avoiding reaction with air and slag, and improving the absorption rate of the molten material. The core is widely used as deoxidiser, desulfuriser, alloying additive, and can change the inclusions in steel. The physical shape effectively improves the quality of steel and foundry products.
Spherical core wire is a strip steel product wrapped with alloy powder. Because of the different coating powders, it can be categorised for different purposes. Steelmaking wire is generally used as a deoxidiser, desulphuriser or carbon additive, for example, CaSi ball wire can be used as a deoxidiser and desulphuriser in a steelmaking agent. Carbon ball cores are used as carbon additives in steelmaking and casting, and FeSiMg cores are used as coking agents in casting.
Common data for steelmaking cored wire are the weight of the strip per metre and the weight of the powder in the coil per metre. The thickness of spherical cored wire is usually 0.6 mm and the weight of the strip is always 170 g/m by weight, these figures differ for different alloys. For example, CaSi6030 and CaSi5528 cored wires have a weight of 230 g/m, CaFe clad cored wires have a weight of 215 g/mm, and carbon clad cored wires have a weight of about 150 g/m.
It should be noted that one type of steelmaking wire with a spherical core is calcium hard core wire. The hard calcium core wire is made of pure calcium wire wrapped around a steel strip, which is easily recovered when wrapped with a steel strip because pure calcium wire reacts easily with oxygen.
When the spherical core wire is used for steel making or casting, the meltable material can be placed in an ideal position in the steel, which can prevent the wrapped powder from reacting with air or slag, and improve the absorption rate of the meltable material.
