The use of silicon calcium alloy
Because calcium has a strong affinity with oxygen, sulfur, hydrogen, nitrogen and carbon in molten steel, silicon calcium alloy is mainly used for deoxidizing, degassing and fixing sulfur in molten steel. A strong exothermic effect is produced when silicon and calcium are added to molten steel. Calcium turns into calcium vapor in molten steel, which has stirring effect on molten steel and is favorable to the floating of non-metallic inclusions. After deoxygenation of Si-Ca alloy, the non-metallic inclusions with large particles and easy to float up are produced, and the shape and properties of the non-metallic inclusions are also changed. Therefore, the silicon calcium alloy is used to produce clean steel, steel with low oxygen and sulfur content, and special performance steel with extremely low oxygen and sulfur content. Adding Si-Ca alloy can reduce the nodulation in ladle nozzle of steel with aluminum as final deoxidizer, and the blockage of the nozzle in the intermediate tank of continuous casting steel and ironmaking. In the out-of-furnace refining technology of steel, silicon calcium powder or core wire is used to deoxidize and desulphurize, so that the content of oxygen and sulfur in steel is reduced to a very low level. It can also control the form of sulfide in steel and improve the utilization rate of calcium. In the production of cast iron, silicon calcium alloy in addition to deoxygenation and purification, but also play a role in inoculation, help to form fine or spherical graphite; The distribution of graphite in gray cast iron is uniform, and the tendency of white casting is reduced. And can increase silicon, desulfurization, improve the quality of cast iron.
The above is to share with you about the content of silicon calcium alloy, hope that through the above content, can let you have a further understanding and understanding of silicon calcium alloy products.
