What industries are seamless metal calcium cored wires used in?
Seamless metal calcium cored wire is suitable for steelmaking. It can purify molten steel, change the form of impurities, improve the castability and mechanical properties of molten steel, and can significantly increase the absorption rate of calcium and reduce steelmaking costs. Its economic effect is significant.
1. In appearance, the conventional metal calcium wire is mechanically pressed with buckles. The metallic calcium wire currently used is seamless and has the appearance of a seamless steel pipe.
2. In terms of internal structure, the outer skin of conventional calcium wire is wrapped with ordinary carbon steel. The content of metallic calcium wire is about 80%, and there are gaps inside after wrapping. The seamless calcium wire covering is made of paper carbon steel 08Al, with a carbon content of ≤0.05% and a metal calcium wire content of 98% (no gaps).
Therefore, in the space behind the traditional calcium line, the air will reduce a lot of calcium content, which will affect the production of molten steel. The yield rate is reported to be 12%. Calcium seamless lines do not have this phenomenon. Maanshan Iron and Steel’s test concluded that the yield rate of the three is 37 %, in terms of use, conventional thread sutures, calcium buckles, and skins are made of ordinary carbon steel. During use, the feed line is prone to breakage and line jamming. This phenomenon does not occur after the seamless calcium wire is yellowed.
Seamless calcium wire is a solution for adding calcium to molten steel. It is a solid calcium core welding wire that has undergone original factory professional manufacturing processes. Therefore, this product can penetrate the solid calcium in the seamless steel strip into the molten steel through ordinary wire feeding equipment, establishing an industry standard for the basic properties of calcium metallurgy, and is reliable and repeatable. The melting point is 850°C, the boiling point is 1480°C, the density is 1.55g/cm3, the melting point in molten steel is close to zero, and it has a great affinity for oxygen. Liquid calcium can dissolve Al2O3 inclusions.
Al2O3 forms larger liquid inclusions after treatment with molten steel and calcium, which easily floats. It reduces the nozzle clogging caused by excessive Al2O3 content in the molten steel and improves the pouring capacity of the molten steel. After calcium treatment, the Al2O3 inclusions retain their spherical shape and their properties are improved after rolling.
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