Abstract: A device for atomizing a metallic, intermetallic or ceramic melt stream by means of a gas to form a spherical powder, comprising a melt chamber, a powder chamber, an induction coil in the melt chamber, a melt material, preferably melt rod in the induction coil and an atomizer nozzle interconnecting the melt and powder chambers and being arranged in a nozzle plate, for the melt stream melted off from the melt material by the induction coil, wherein the atomizer nozzle has an exclusively convergent nozzle profile having nozzle flanks which have a circular-arc-shaped cross-section, and therefore both the atomizing gas and the melt stream and the droplets generated therefrom reach a velocity which is at most equal to, preferably below the acoustic velocity of the atomizing gas.

Abstract: The present invention relates to a doctor blade unit for an additive manufacturing system having a pulverous starting material. By means of the doctor blade unit according to the invention, improved linearity of the doctor blade and parallelism with respect to the build plane are achieved. The doctor blade is suspended on a crossmember by means of adjustable fastening elements, and the crossmember in turn is fastened, on one side by means of a fixed bearing and on the other side by means of a floating bearing, to a guide support.

Abstract: In a process and an apparatus for austempering, metal workpieces and optional tempering bodies are quenched in a quenching volume V of a quenching apparatus, in which the quenching volume V is flowed through by a cooling fluid, and the workpieces are tempered by thermal radiation of the tempering bodies, by thermal radiation of one or more heating elements arranged in the quenching apparatus, or by a thermal fluid in such a way that an average temperature T(t) of the workpieces follows a progression over time according to the relationship T ? ( t ) = T 0 + T 1 [ 1 + tanh ? ( - t ? ) ] where t is the time in seconds, 150° C.?T0?250° C., 600° C.?T1?820° C., 12 s???24 s, 0 s?t?? and 180 s???240 s.

Abstract: A device for separating interconnected transport boats that are movable in a first plane in an intended direction of motion includes a substantially oval, non-circular separation disk aligned parallel to the first plane and connected to a rotary drive and a lifting device via a drive shaft. The separation disk is movable by means of the lifting device in the direction of the transport boats to be separated in order to engage with a corresponding total recess in the transport boats to be separated. In addition, the separation disk is rotatably movable in, and/or parallel to, the first plane by means of the rotary drive in order to separate the transport boats to be separated from each other by rotating the separation disk.

Abstract: The invention relates to an EIGA coil (10) for partial melting an electrode (40). The EIGA coil (10) comprises a plurality of windings (12A, 12B, 12C) which are coaxially arranged with respect to a center axis (M) and axially spaced from each other, wherein each of the plurality of windings (12A, 12B, 12C) is formed in the shape of a ring interrupted by a gap (14A, 14B, 14C) and equidistant with respect to the center axis (M) and extending in a plane perpendicular to the center axis (M). Adjacent windings (12A, 12B; 12B, 12C) of the plurality of windings (12A, 12B, 12C) are respectively connected to each other via a connecting portion (20AB, 20BC; 120AB, 120BC).

Abstract: The invention relates to a remelting plant comprising a furnace chamber (50), which can be positioned over a crucible (60) of a melting station, an electrode rod (48), which by way of a lead-through (52) can be inserted or is inserted in the furnace chamber (50), in order to contact a consumable electrode (58), and a guide column (30), on which an electrode rod carriage (40) that is fixed-ly connected to the electrode rod (48) is guided in an axially movable manner, in order to move the electrode rod (48) in relation to the furnace chamber (50), and on which a chamber carriage (38), which is connected or can be connected to the furnace chamber (50), is guided in an axially movable manner, in order to move the furnace chamber (50).

Abstract: 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 (12) in the form of a liquid jet (10); and generating high-frequency travelling electromagnetic fields surrounding the liquid jet (10) which travel in the first direction (12) and accelerate the liquid jet (10) in the first direction (12), thereby atomizing the liquid jet (10).

Abstract: In a thermal or thermochemical treatment, metal workpieces together with a metal guide are arranged on a batch carrier. The present invention relates to a device for flow guidance for metallic pieces during such thermal or thermochemical treatment and quenching, as well as methods using the same. The fluid guide particularly ensures a uniform cooling of an inner and/or outer lateral surface of the workpieces during the quenching process.

Abstract: An apparatus and a method for coating workpieces with thermal barrier coatings. A manipulator shaft is guided here through a duct equipped with telescopic segments into the process chamber. The invention permits a particularly compact configuration of the plant.

Abstract: The invention relates to a device for water spray quenching that includes (i) a quenching chamber designed and set up to receive metallic workpieces, with a batch of volume V0 of 0.045 to 3.5 m3 and (ii) at least one atomizer which is configured to atomize water in air or nitrogen and is fluidically connected to the quenching chamber; in which the at least one atomizer and the device are designed and set up to generate a spray mist with a water content of 2.5 to 40 vol. % and a Sauter mean diameter of 20 to 2000 m and also a spray mist flow through the batch volume V0 of 0.05 to 25 m3/s.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: The invention relates to a remelting plant comprising a furnace chamber (50), which can be positioned over a crucible (60) of a melting station, an electrode rod (48), which by way of a lead-through (52) can be inserted or is inserted in the furnace chamber (50), in order to contact a consumable electrode (58), and a guide column (30), on which an electrode rod carriage (40) that is fixed-ly connected to the electrode rod (48) is guided in an axially movable manner, in order to move the electrode rod (48) in relation to the furnace chamber (50), and on which a chamber carriage (38), which is connected or can be connected to the furnace chamber (50), is guided in an axially movable manner, in order to move the furnace chamber (50).

Abstract: 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.

Abstract: The present invention relates to devices used during the thermomechanical treatment of workpieces. During thermochemical treatment, metallic workpieces are mounted on and/or shielded by a high-temperature-resistant device configured specifically for this purpose in order to reduce dimensional and shape changes or warping. The inventive devices provide support and flow guiding for metallic workpieces during thermochemical treatment, and include a plate or a ring having a first and a second face, in which the second face is equipped with three or more support elements and the support elements are bound to a support plane.

Abstract: A process and apparatus for thermochemically hardening workpieces is provided incorporating the following steps, carried out in a variable sequence: one or more carburizing steps, each in a carbon-containing gas atmosphere at a pressure of less than 50 mbar, the workpieces being held at temperatures of 900 to 1050° C.; if appropriate, one or more diffusion steps, each in a gas atmosphere at a pressure of less than 100 mbar; and one or more nitriding steps, each in a nitrogen-containing discharge plasma at a pressure of less than 50 mbar, the workpieces being held at temperatures of 800 to 1050° C.

Abstract: A melting vessel for performing an electro-slag melting method and such a method are presented. Measuring devices measuring a temperature at different heights allow conclusions about position and height of a slag zone in the melting vessel during the method.

Abstract: A method and a device for producing ingots from metal or metal alloy. The method and the device are suitable for producing ingots from nickel, titanium, vanadium, niobium, tantalum, zirconium, hafnium, or alloys thereof and alloys of the metals in continuous casting methods. The device has an ingot chamber, which is suitable for receiving multiple cast ingots and for allowing the ingots to cool in the ingot chamber. For this purpose, the ingots are arranged in the ingot chamber in a horizontally movable manner on ingot tube section.