公开(公告)号：EP0729798A4

公开(公告)日：1999-01-07

申请号：EP95929214

申请日：1995-08-23

申请人： NIPPON STEEL CORP ,  ASAI SHIGEO

发明人： ASAI SHIGEO ,  TOH TAKEHIKO ,  WAJIMA KIYOSHI ,  SAWADA KENZO ,  TAKEUCHI EIICHI ,  SASSA KENSUKE ,  LI TINGJU

IPC分类号： B22D11/115 ,  B22D11/10

CPC分类号： B22D11/115

摘要： A method of continuously casting a molten metal, capable of minimizing the unstability of initial solidification of a molten metal and stably attaining the improvement of the performance of being lubricated of a cast piece and the property of the surface thereof, and an apparatus for embodying the method. A method of continuously casting a molten metal, wherein a molten metal is poured into a mold, which is vibrated or not vibrated in a predetermined mode, with an alternating current supplied to an electromagnetic coil provided so as to surround a wall of the mold or an electromagnetic coil buried in a side wall thereof, continuous casting being carried out as an electromagnetic force is applied to the molten metal which is about to start being solidified, characterized in that the amplitude or waveform of the alternating current supplied to the molten metal is varied periodically; and an apparatus for embodying the method.

公开(公告)号：EP0750958A4

公开(公告)日：1999-03-10

申请号：EP95905764

申请日：1995-01-12

申请人： NIPPON STEEL CORP

发明人： FUJISAKI KEISUKE ,  WAJIMA KIYOSHI ,  UMETSU KENJI ,  SAWADA KENZO ,  UEYAMA TAKATSUGU ,  TOH TAKEHIKO ,  OKAZAWA KENSUKE ,  OKUMURA YASUSHI

IPC分类号： B22D11/115 ,  B22D11/10

CPC分类号： B22D11/115

摘要： A method of and an apparatus for continuously casting slabs of a metal, such as steel which do not have defects, such as vertical cracks on a surface thereof, by uniformly turning a molten metal in a meniscus plane in a mold. In a meniscus plane, the electromagnetic agitating thrusts applied along two longer sides of the mold are directed contrariwise, and a thrust directed from an immersed nozzle toward the shorter sides of the mold is set larger than that directed from the shorter sides of the mold toward the immersed nozzle. A circuit connecting each coil of an electromagnetic agitation coil unit of a shafting magnetic field system and a three-phase power source together is point symmetric with respect to the immersed nozzle and relative to the two longer sides of the mold and is divided into two portions on each longer side of the mold, and the divided portions are parallel to each other and have different impedances.