Levitation melting method and melting and casting method

Details Levitation melting method and melting and casting method Levitation melting method and melting and casting method

1996-05-01

1998-11-17

Kunemund, Robert

Single-crystal, oriented-crystal, and epitaxy growth processes;

Processes of growth from liquid or supercritical state

Havin growth from molten state

117901, 1641222, 164493, C30B 1102

Patent

active

058370552

ABSTRACT:
Disclosed is a levitation melting method comprising applying a high-frequency current to a high frequency induction coil wound around a melting crucible to induction-heat a material introduced to the melting crucible; and erecting the resulting molten metal to be in no contact with the inner wall surface of the melting crucible with the bottom of the material being maintained in the solidified state; wherein a power input P of a high-frequency power source to the high-frequency induction coil, an inner radius R at the bottom of the crucible and super heat .DELTA.T of the molten metal satisfy the relationship of P/R2=.DELTA.T.multidot.(0.0008 to 0.002), as well as, a melting and casting method for casting the molten metal prepared by the levitation melting method described above into a mold using a snout suspended above the melting crucible such that the lower end of the snout may be submerged in the molten metal.

REFERENCES:
patent: 4373571 (1983-02-01), Yarwood et al.
patent: 4441542 (1984-04-01), Pryor et al.
patent: 4735252 (1988-04-01), Roberts
patent: 5003551 (1991-03-01), Mortimer
patent: 5014769 (1991-05-01), El-Kaddah et al.
patent: 5033948 (1991-07-01), El-Kaddah et al.

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