Harmfulness of oxygen in molten steel
1. Result in inclusions. When the molten steel solidifies, the excess oxygen combines with other elements in the steel to form non-metallic inclusions,reduces slab mechanical properties, magnetic permeability and welding properties.
2 Form bubbles. If oxygen content in molten steel is too high, it will react with the carbon during the casting process to produce CO gas, which will result in ingots defects such as pores, looseness,even ingots are scrapped.
3. Oxygen can reduce the solubility of sulfur in steel, aggravate the harmful effects of sulfur, making the red-short of steel more serious.