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The role of each element in silicon aluminum barium calcium


 Silicon aluminum barium calcium is a common compound deoxidizer in steel smelting. Compared with other deoxidizers such as ferrosilicon, silicon aluminum barium calcium has more deoxidizing elements, and under the comprehensive action of various elements, for The quality of the steel also helps a lot. The deoxidizing element in silicon aluminum barium calcium is not only silicon, aluminum, barium, calcium, etc. can also be combined with oxygen to remove oxygen. In order to deepen everyone's understanding of this product, let's analyze the role of different elements in detail.

Silicon: Silicon is added as a reducing agent and deoxidizer in the steelmaking process. Silicon can improve the elastic limit, yield point and tensile strength of steel, so it is widely used as spring steel. Combining silicon with molybdenum, tungsten, chromium, etc., can improve corrosion resistance and oxidation resistance.

Aluminum: Aluminum is a commonly used deoxidizer in steel. Adding a small amount of aluminum to steel can refine grains and improve impact toughness. Aluminum also has oxidation resistance and corrosion resistance. The combination of aluminum, chromium and silicon can significantly improve the high-temperature peeling performance and high-temperature corrosion resistance of steel. ability.

Barium: Barium will work in the same way as calcium, but its reaction with oxygen occurs after the reaction of calcium with oxygen. The advantage of adding barium is that the activated crystal nuclei containing barium are stable for a long time, And it will make the inoculant more recession resistant. Such an inoculant is useful in casting large parts and production lines where delays are common.

Calcium: Adding calcium to steel can refine grains, partially desulfurize, and change the composition, quantity and shape of non-metallic inclusions. It is basically similar to the effect of adding rare earth to steel. Improve the corrosion resistance, wear resistance, high temperature and low temperature resistance of steel; improve the impact toughness, fatigue strength, plasticity and welding performance of steel.

Although there are many elements in silicon aluminum barium calcium, there are very few impurities harmful to steel. Therefore, using silicon aluminum barium calcium as a deoxidizer will rarely add impurities to molten steel. This is the requirement for the selection of deoxidizers. It is very important for the strict deoxygenation period. Calcium in silicon aluminum barium calcium can also provide calcium source supplement for steel in the later stage of steel smelting, thereby increasing the calcium content in steel, which is very helpful for the wear resistance and toughness of steel.