Cored wire can be added more efficiently to molten steel or iron during steelmaking or casting. Professional wire feeding equipment allows for the insertion of cored wires into desired locations. When the core skin melts, the cored wire can be completely dissolved in the ideal position, avoiding any reaction with air and slag. This improves the absorption rate of the smelting material. Core-clad wire is widely used as a deoxidiser, desulfuriser, alloy additive and can change the inclusion in molten steel. The physical form effectively improves the quality of steelmaking and casting products.
Spherical cored wire is produced by wrapping strip steel with strip alloy powder. The coating powder determines the product's use. Steel-making cored wire is typically used as a deoxidiser, desulfuriser or carbon additive. For example, CaSi cored wire is used as a deoxidiser and desulfuriser in steelmaking agents. Carbon ball-cored wire is used as a carbon additive in steelmaking and casting. FeSiMg cored wire is used as a nodulation agent in castings.
The general data for steel-making core-clad wire is the weight of the strip steel per metre and the weight of the powder per metre. The thickness of ball core-clad wire is typically 0.6mm, with a weight of the strip of 170g/m². Different alloys will have different data. For example, CaSi6030 and CaSi5528 core wires weigh 230g/m², while CaFe core wires weigh 215g/m and carbon core wires weigh approximately 150g/m².
It should be noted that one type of steel-making spherical cored wire is a solid calcium-core charge wire. The solid calcium core wire is made of pure calcium wire wrapped in strip steel. The use of steel tape to wrap the pure calcium wire is an effective method of preventing it from reacting with oxygen.
The use of spheroidised cored wire in steelmaking or casting allows the smelting raw material to be placed in the optimal position within the molten steel, preventing the reaction of the wrapped powder with air or slag and enhancing the absorption rate of the smelting material.
