METHOD FOR LADLE-REFINING STAINLESS STEEL

摘要

PPROBLEM TO BE SOLVED: To provide a method for reducing the charging quantity of Ca-Si wire by improving the charging rate of the Ca-Si wire and the yield of Ca addition in a method for adjusting the additional quantity of Ca by charging the Ca-Si wire into the molten steel in the operation of LF (Ladle Furnace)-refining stainless steel. PSOLUTION: Scraps being raw materials are melted and refined in an electric furnace, and the obtained molten stainless steel is further ladle-refined. At the end stage of the refining, the Ca-Si wire is charged into the molten steel to perform the Ca-addition, thereby adjusting components of the molten steel. That is, the charging rate of the Ca-Si wire controlled to the optimal rate of 100 m/min, so that the charged Ca-Si wire is allowed to reach the bottom part of the ladle and is successively melted, thereby improving the yield of the Ca-additional quantity into the molten steel into the maximum of 6.7%. PCOPYRIGHT: (C)2009,JPO&INPIT