Method for Manufacturing Steel Including Aluminum and Sulfur

摘要

The present invention relates to a process for producing aluminum and a sulfur-added steel is used as a material such as a crank shaft, the coupling, connecting rods, etc. of industrial machines, automobiles, it is possible to precisely control the sulfur concentration in the steel, the continuous casting process, in the nozzle clogging is prevented, and to provide for a method for producing a cleanliness (T. [O]) of aluminum and sulfur-added steel, which greatly improve the molten steel, it is an object.; The present invention relates to a process for preparing a sulfur-added steel and aluminum,; In the process of tapping the molten steel in the ladle was added deoxidizer Al and gatan agent, immediately after the addition of metallic Al content not less than 40% slag per ton of molten steel, adding a deoxidizer 0.6~2.0kg; The step of transferring the vector containing the molten steel in a ladle (LF) heating the molten steel to the target temperature; Steps to transfer the vector containing the molten steel is heated to a target temperature as described above, in the vacuum degassing apparatus for vacuum refining in vacuum 2torr less; The method comprising the argon (Ar) gas through a gas inlet nozzle mounted at the bottom of said blow-ray stirred to 5-10 liters per minute (ℓ) flow rate; And after the Fe-S outer aluminum and sulfur addition method Steels comprising blowing at a rate of 3.0~5.0 meters (m) per second to the invention.