Process for regulating the level of the line of contact of the f

Details Process for regulating the level of the line of contact of the f Process for regulating the level of the line of contact of the f

1987-11-18

1989-02-28

Lin, Kuang Y.

Metal founding

Process

Shaping liquid metal against a forming surface

164502, B22D 2702

Patent

active

048076945

ABSTRACT:
In a continuous vertical casting operation carried out in a mould 3, a coil 7 applies a periodic magnetic field of variable strength whose direction is substantially parallel to the axis of the mould 3 to the liquid 5 as it solidifies, in order to regulate the level of the line of contact of the free surface of the metal 5 with the mould 3. The height of the contact of the metal with the mould can be reduced from h.sub.1 to h.sub.2 by applying the magnetic field, and the strength of the field is adjusted in dependence on the desired level. The procedure is used in casting semifinished metallurgical products, in particular in aluminium and its alloys, in which there is a wish to obtain a cortical region of zero thickness, a fine grain without the preliminary addition of refining agents, and an absence of pitting.

REFERENCES:
patent: 4355679 (1982-10-01), Wilkins
patent: 4456054 (1984-06-01), Henders

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