Metal founding – Process – Shaping liquid metal against a forming surface
Patent
1990-03-02
1991-07-23
Lin, Kuang Y.
Metal founding
Process
Shaping liquid metal against a forming surface
164504, B22D 2702
Patent
active
050335340
ABSTRACT:
A method for continuous casting of steel comprises charging molten steel from a tundish into a mold through exit ports of an immersion nozzle, introducing a magnetic field vertically to a flow of the molten steel from the exit ports by the use of at least a pair of direct current magnets which are arranged on the outer side of copper plates on the wide side of the mold, the immersion nozzle being placed between the direct current magnets and polarities of magnetisms on the top side of the magnets being the same, and casting the molten steel at a predetermined casting rate. One magnetic pole of the direct current magnet is positioned at an upper end of copper plate on the wide side of the mold and the other magnetic pole being positioned at lower than the exit port of the immersion nozzle and on the outer side of copper plate on the wide side of the mold. The immersion nozzle has two exit ports, each of which has an angle of 15.degree. to 45.degree. downward. The direct current magnetic field is controlled within the range of 1000 to 4000 gauss.
REFERENCES:
patent: 4495984 (1985-01-01), Kollberg
1. 68-S 270 Nagai et al., Iron and Steel, 1982.
2. 68-S 920 Suzuki et al., Iron and Steel, 1982.
3. 72-S 718 Ozuka et al., Iron and Steel, 1986.
Ao Norio
Kanao Yoshiyuki
Kitagawa Toru
Miyahara Shinobu
Nagamune Akio
Lin Kuang Y.
NKK Corporation
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