Method for manufacturing low-carbon molten steel by vacuum degassing and decarburization treatment

摘要

Gas for reflux in the vacuum degassing process, CO₂The carbon concentration of the molten steel is reduced to 50 ppm or less from the start of the degassing treatment in the vacuum degassing treatment of the molten steel so as to reduce the gas cost without increasing the addition amount of the alloy, Until reaching RTI ID = 0.0 ₂A method for vacuum degassing and decarburization of molten steel using a gas to be blown and thereafter using Ar gas.