B - Operations – Transporting – 22 – D
Patent
B - Operations, Transporting
22
D
22/55
B22D 27/02 (2006.01) B22D 11/045 (2006.01) B22D 11/115 (2006.01)
Patent
CA 1201866
ABSTRACT OF THE DISCLOSURE A within-mold electromagnetic stirring method and apparatus therefore is disclosed which improves the quality of ingots obtained by horizontal continuous cast- ing by minimizing occurrence of surface defects such as cold shut and vertical cracks. The stirring method is for use in a horizontal continuous casting apparatus including a tundish, a pouring nozzle, a mold connected to the pour- ing nozzle, and an electromagnetic coil disposed around the mold to electromagentically stir molten steel passing through the mold by a magnetic field established by the electromagnetic coil. The method is characterized in that the magnetic field is induced by an alternating current with a frequency (f) of 1-15 Hz and its maximum magnetic flux density G (in gauss) is within the range from 1045?e -0.16f to 2054?e -0.12f and in that the position where the maximum magnetic flux density is produced is located within the range of the 350 mm from the junction between the pouring nozzle and the mold in the direction of drawing of the cast-piece.
422375
Ayata Kenzo
Fujimoto Takahiko
Miyazaki Jun
Mori Takasuke
Nakata Hitoshi
Kabushiki Kaisha Kobe Seiko Sho
Riches Mckenzie & Herbert Llp
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