Ald Vacuum Technologies Gmbh

Gfe Metalle Und Materialien Gmbh

Sergejs Spitans

Henrik Franz

Bjoern Sehring

Markus Holz

Egon Bauer

Andreas Krieger

Markus Winton

Ulrich Betz

Volker Güther

Melissa Allen

Franz Pfahls

Hans-Jürgen Radtke

Karin Ratschbacher

Björn Sehring

A device for producing metal powder. This includes a melting chamber, a downstream atomization tower, and a nozzle assembly for atomizing a melt jet. The device further includes an induction coil disposed within the melting chamber and operated at a melting frequency f, the induction coil is adapted to locally melt a material rod at least section-wise received therein, to produce the melt jet to be atomized, and a separate intermediate coil disposed within the melting chamber and operated at a base frequency f, wherein said intermediate coil is disposed downstream of the induction coil and aligned coaxially with the induction coil. The intermediate coil is configured to superheat the melt jet in a region between the induction coil and the nozzle assembly. The following applies to a frequency ratio Fof the base frequency fto the melting frequency f, 1≤F=f/f≤500.

Device and method for producing metal powder using an induction coil and an intermediate coil

A device for atomizing a metallic, intermetallic or ceramic melt stream by means of a gas to form a spherical powder, comprising

Device for atomizing a melt stream by means of a gas

The invention relates to an EIGA coil () for partial melting an electrode (). The EIGA coil () comprises a plurality of windings (A,B,C) which are coaxially arranged with respect to a center axis (M) and axially spaced from each other, wherein each of the plurality of windings (A,B,C) is formed in the shape of a ring interrupted by a gap (A,B,C) and equidistant with respect to the center axis (M) and extending in a plane perpendicular to the center axis (M). Adjacent windings (A,B;B,C) of the plurality of windings (A,B,C) are respectively connected to each other via a connecting portion (AB,BC;AB,BC).

EIGA coil having annular turns

The invention relates to a method for splitting an electrically conductive liquid, in particular a melt jet, comprising the steps providing the electrically conductive liquid which moves in a first direction () in the form of a liquid jet (); and generating high-frequency travelling electromagnetic fields surrounding the liquid jet () which travel in the first direction () and accelerate the liquid jet () in the first direction (), thereby atomizing the liquid jet ().

Method and device for breaking up an electrically conductive liquid

The invention relates to a method for producing casting bodies in a levitation melting method in which a batch of an electrically conductive material is brought into the sphere of influence of at least one alternating electromagnetic field by means of a starting material having a plurality of pre-separated batches separated by regions of reduced cross-section so that the batch is kept in a state of levitation. The regions are designed in such a way that separation of the pre-separated batches takes place only during melting in an alternating electromagnetic field. The melt is then cast into casting moulds.

Levitation melting process

The invention relates to a levitation melting process and an apparatus for producing castings comprising a ring-shaped element of a conductive material for introducing the casting of a molten batch into a casting mould. In the process, the ring-shaped element is introduced into the region of the alternating electromagnetic field between the induction coils in order to cast the molten batch, thereby initiating a targeted run-off of the melt into the casting mould by influencing the induced magnetic field.

Levitation melting method using an annular element

The invention relates to a levitation melting process and a device for producing castings with movable induction units. In this process, induction units are used in which the opposite ferrite poles with the induction coils are movable and move in opposite directions. In this way, the induction units for melting the batches can be arranged close together in order to increase the efficiency of the induced magnetic field. When casting the molten batch, the induced magnetic field is reduced by increasing the distance between the ferrite poles with the induction coils, thus preventing the melt from touching the ferrite poles or the induction coils.

Levitation melting method using movable induction units

The invention relates to a levitation melting method and an apparatus for producing casting bodies with tilted induction units. During this method, induction units are employed in which the opposing ferrite poles with the induction coils are not arranged lying in one plane, but tilted at a determined angle to the levitation plane. In this way, an increase in efficiency of the induced magnetic field for melting the batches can be achieved with the induction units. The tilted arrangement increases the portion of the induced magnetic field that effectively contributes to the holding force of the field for levitation of the melt.

Device and method for levitation melting using induction units which are arranged in a tilted manner

A method for producing cast items in a casting method, wherein a charge of a conductive material is introduced into the sphere of influence of at least one alternating electromagnetic field, so that the charge is kept in a levitating state. The melt is poured into moulds in order to produce turbine blades, prostheses or turbocharger impellers.

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Hanau, Germany

Sergejs Spitans