Oblon, Spivak, McClelland, Maier & Neustadt
Method of electromagnetic stirring in continuous metal casting process
 A method of electromagnetically stirring molten metal in an unsolidified portion of a continuously cast strand by a magnetic field formed by applying alternating current to at least two exciting coils, the method comprising: supplying to one of the exciting coils a first alternating current of a frequency in the range of 1-60 Hz and to the other one of the exciting coils a second alternating current with a frequency difference in the range of 0.03-0.25 Hz from the first alternating current to form a varying composite magnetic field thereby to induce stirred movement of varying direction and intensity in the molten metal. 
Kabushiki Kaisha Kobe Seiko Sho
B B
B22D B22D
inventional inventional
Toshiyasu Kenzo Koichi Yasuo Yasuhiko Hiroshi Masakazu Takao
Onishi Ayata Fujiwara Suzuki Ohta Takagi Itashiki Shiozawa