AN IMPROVED ARGON-OXYGEN DECARBURIZATION PROCESS FOR REFINING STAINLESS STEEL BY USE OF CARBON DIOXIDE

摘要

An improved argon-oxygen decarburization process for refining stainless steel comprising injecting a three component gas mixture consisting of oxygen, argon and carbon dioxide into the molten steel during decarburization. The critical upper limit of CO2 injection into the melt is defined, below which the carbon removal efficiency is improved. The preferred flow rate of CO2 during each of the three principal phases of decarburization is set forth as a function of the flow rate of oxygen and argon, bath temperature and carbon content of the melt.