CASTING METHOD FOR ACTIVE METAL

Title:

CASTING METHOD FOR ACTIVE METAL

Document Type and Number:

WIPO Patent Application WO/2018/110370

Kind Code:

A1

Abstract:

In this casting method for an active metal, in an induction melting furnace (3) using a water-cooled copper crucible (2), a thin ingot (S) of an active metal is cast by tapping a melt M from a tapping hole (5) provided in a base section of the crucible (2) into a mold (4), wherein, when casting is performed under casting conditions in which the ingot has a diameter (D) of at least 10 mm, the ratio (H/D) of the height H of the ingot to the diameter D of the ingot is at least 1.5, and the weight of the melt M tapped in casting is no more than 200 kg, the temperature of the melt M during casting is set to be higher than the melting point of the active metal and casting is performed while the casting velocity V (mm/s), which is the velocity at which the casting advances in the mold 4, is controlled so that the relationship with the height H of the ingot satisfies V ≤ 0.1H by adjusting the opening diameter of the tapping hole 5.

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Inventors:

MORIKAWA YUZO
MATSUWAKA DAISUKE
ISHIDA HITOSHI
IKEDA SHUSHI

Application Number:

PCT/JP2017/043660

Publication Date:

June 21, 2018

Filing Date:

December 05, 2017

Export Citation:

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Assignee:

KOBE STEEL LTD (JP)

International Classes:

B22D7/00; B22D18/06; B22D21/06; B22D27/04; F27B14/06; F27B14/18

Foreign References:

JPH11310833A	1999-11-09
JP2009113063A	2009-05-28
JP2006281291A	2006-10-19
JP2006122920A	2006-05-18
JP2003311376A	2003-11-05
JPH0957422A	1997-03-04
JPH1157984A	1999-03-02
JPH1187044A	1999-03-30
JP2016241248A	2016-12-13
JP2017206165A	2017-11-24

Other References: