| 摘要 |
PURPOSE:To obtain a sound material having less skin holes in the stage of acting moving magnetic fields in the width direction of a slab by providing electromagnetic coils in the specific positions below the level of the molten metal in a mold thereby acting uniform flow near the molten metal level. CONSTITUTION:In continuous casting of slabs, coils which generate moving magnetic fields are installed in such a way that the central positions of the coils come respectively within the (0.7-1.3)XL/2 range below the level of the molten metal in the mold. Since the coil positions are specified in such way, the moving magnetic fields act in the width direction of the mold in sufficient contact therewith and form the two rotating flows symmetrical to the center of the width, thereby acting the uniform flow near the level of the molten metal. If the slab is cast under such conditions, the solidified shell is washed uniformly, and internal inclusions and hole like defects are reduced. |
