This is the metal core of the wire that is used to calcium treat steel. The wire can be used in a wide range of applications to desulfurize molten iron, remove any inclusions and deoxidize the steel. It can also help improve the quality and characteristics of molten steel. It can create calcium sulphide and oxide to absorb oxygen from the air and reduce sulphur content of molten steel, making it more efficient than traditional methods.
The first calcium treatments include spraying or adding calcium to molten metal. However, they have the disadvantages of unstable treatment effect and high cost. The method of using a feeding ladle with calcium-cored wire was therefore adopted to replace them. The treatment is more effective and easier to use. It is made of solid calcium and iron powder. It has smaller dimensions and greater surface areas than traditional calcium powder. It has superior performance over extruded rod calcium and can be used under various metallurgical circumstances.
The average increase in calcium recovery is 15% when using cored wire. It decreases the amount that calcium is lost from molten steel, and also reduces how many threadings are required for each ton. Additionally, the calcium-cored wire helps prevent nozzle clogging. Calcium cored steel wires are also more conducive to high-quality production.
They are an effective calcium treatment method, in particular for steels that have low calcium contents. The cored wires can be used for deoxidizing the steel, desulfurizing the sulphur and changing the inclusion composition. They can also increase the machinability of molten steel, and they are safer than other types of metal cores. Cored wire has the advantage that it is able to be added into molten metal without causing any reaction with air. It is much more economical than some other smelting methods, like spraying calcium in the ladle.
Moreover, the welded sheath of the cored wire prevents the iron oxide in the core from contaminating the molten steel. This has a significant advantage compared with cored steels made of calcium powder. These wires may contain iron oxide and, as the calcium evaporates from the sheath, it will also contaminate the hot steel. The sheath can be used for cored wires to resist corrosion and wear. This is very important, as the cored wires will be exposed to a high temperature for a long period of time. The welded sheath can also help prevent contamination of the molten steel by impurities from the core. It is important to have this in continuous casting plants. The sheath is also used to protect cored wires from damage due to abrasion caused by the steel molten during injection. The cored steel wires generally have a greater service life than the powdered cored metal wires.
English
Write a Message