The pure Calcium Cored Wholesale Wire (CWLW) is a alloy wire that is utilized for deoxidizing and desulfurizing process of ladles. It comprises an outer steel strip and a solid inner calcium metal rod that is rolled, then pressed together. This kind of cored wire is able to adjust and control the content of easily oxidized elements and trace elements. This can improve alloy yield, reduce cost of smelting, and cut down on smelting time. It also can change the nature and form of inclusions in slag, thus increasing the quality of molten steel.
The earliest methods of the addition of calcium to steel molten involves applying calcium alloy direct onto the slag, or introducing it in bulk form. Due to the unstable process effect as well as the cost the method has been gradually eliminated, and cored wire technology is now taking its place. This is a technique of alloy feed developed by jet metallic metallurgy.
Cored wire is composed of stripe covered in alloy powder. It is available in many different alloys. It includes silicon calcium wire ferrosilicon calcium, ferrosilicon as well as calcium aluminum wire. The wires are mostly used to refine and element fine tuning outside within the furnaces of steel.
Alongside its fundamental role in refining, pure calcium-cored wire is now employed as a deoxidizer in low-alloys of high-strength to stop the development of oxides which result from a poor oxygen transfer rate during the smelting process. Additionally, it's also effective in reducing the quantity of fumes that are produced by welding. According to experiments at several famous steel mills, it's feasible for calcium-cored wires to produce fumes that are 20 - 50% lower than comparable flux cored wires.
For this purpose, the calcium metal core of a pure calcium-cored wire is cut into pieces of a specific size and then wrapped tightly with top quality cold-rolled low carbon steel strip. The steel core in the wire is able to melt the slag once it's fed into the layer. The result is that calcium metal is added to the steel that is molten. It reduces slag oxide, enhances the absorption of calcium into molten iron, and increases calcium recovery. This is a great alternative to conventional de-sulfurizers and deoxidizers. This reduces the chance that the caster's nozzle because of alumina inclusions (AL2O3) resulted from previous aluminum deoxidation. It is especially important in high-strength alloys. Additionally, it can greatly improve the casting performance that the iron has.
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