Firstly: Core wire is a kind of wire material used in steel refining, which is composed of core powder layer and wrapping skin made of strip steel sheet wrapped on the outer surface of core powder layer.
Second: When in use, the cored wire is continuously fed into the ladle through the wire feeder. When the cladding of the core wire entering the ladle is melted, the core powder layer is exposed and comes into direct contact with the molten steel to carry out the chemical reaction, and through the kinetic effect of argon gas stirring, it can effectively achieve the purpose of deoxidation, desulphurisation, and removal of inclusions, so as to improve the quality and performance of the steel.
Third: it can be seen, in order to make the cored wire effectively purify the steel, must meet two conditions, respectively is the core powder layer of active ingredients must be able to immersed into every corner of the steel; core powder layer of active ingredients with a large enough to seize the oxygen and sulfur atoms of the ability.
Fourth: calcium silica core wire in the calcium is a commonly used core powder material, although it is a strong deoxidiser, but because of its relatively light specific gravity, relatively low melting point, and easy to produce bubbles at high temperatures, so the simple use of calcium metal core wire core powder layer will appear core wire just be sent to the refining furnace in the phenomenon of combustion, and core wire into the middle of the molten steel below, can not achieve the desired purification effect! Even if the use of high-temperature-resistant coating materials and rapid insertion and other measures, can not completely hinder its combustion, and the core powder layer in this condition combustion can not achieve the desired purification effect at the same time, it will also result in the waste of higher-priced calcium resources.
