Abstract: A laser metal deposition process is disclosed for carrying out laser metal deposition, whereby the component is metallurgically bonded to partially molten filler material by means of a laser beam directed onto a surface of a component, whereby the filler material is delivered into the laser beam as a powder jet of particles, whereby the particles absorb optical energy from the laser beam in a beam-particle interaction zone at a distance (A) from the surface of the component as a function of process parameters (P) of the laser metal deposition process and of the grain fraction and material properties of the particles and are applied to the surface of the component, whereby the process parameters (P) are adjusted such that at least a proportion of the particles reach the boiling temperature (S) along their trajectory through the laser radiation.

Abstract: The invention relates to a material feeding device. The material feeding device according to the invention to be used in a material processing device has a material feeding channel with an output end facing a processing site during operation of the material feeding device, and is characterized in that the material feeding device has at least one microchannel.

Abstract: A distractor device includes a longitudinal guiding element and a longitudinal driving element, such as a threaded rod, which may be arranged substantially parallel to the guiding element such that the threaded rod may rotate about a rotation axis substantially parallel to the longitudinal axis of the guiding element. First and second distractor arms are arranged extending along first and second lateral axes from the guiding element. The first and second lateral axes are substantially orthogonal to the longitudinal axis of the guiding element. The first and second distractor arms are captively displaceable along the guiding element, such that the first and second distractor arms are displaceable away from each other by rotating the threaded rod in a first rotational direction, and towards each other by rotating the threaded rod in a second rotational direction, the second rotational direction being opposite to the first rotational direction.

Abstract: A method for generating, in layers, an application structure made of high heat resistant super alloys on a substrate is provided. A powdery construction material is melted by an energy beam at a working point, wherein the working point is guided across the substrate along a primary movement direction and thus swings transversely to the primary movement direction. The working point thereby swings from a first edge of a respective layer of the application structure to a second edge of the layer. In this way, a time interval passes between departure from a respective edge and a return to the respective edge directly following the departure, such that a melt bath on the respective edge solidifies into a paste-like zone during the time interval.

Abstract: Applying material along parallel welding lines per welding layer, and changing a direction of extension of the welding tracks by 90° for the next welding layer, is provided.

Abstract: A method and component of coating layers having different thicknesses are produced by the variation of the powder mass flow, whereby the microstructure of the entire build-up welded area is adjusted in a targeted and an advantageous manner is provided.

Abstract: A distractor device includes a longitudinal guiding element and a longitudinal driving element, such as a threaded rod, which may be arranged substantially parallel to the guiding element such that the threaded rod may rotate about a rotation axis substantially parallel to the longitudinal axis of the guiding element. First and second distractor arms are arranged extending along first and second lateral axes from the guiding element. The first and second lateral axes are substantially orthogonal to the longitudinal axis of the guiding element. The first and second distractor arms are captively displaceable along the guiding element, such that the first and second distractor arms are displaceable away from each other by rotating the threaded rod in a first rotational direction, and towards each other by rotating the threaded rod in a second rotational direction, the second rotational direction being opposite to the first rotational direction.

Abstract: Applying material along parallel welding lines per welding layer, and by changing direction of extension of the welding tracks by 90° for the next welding layer, provided.

Abstract: A method for generating, in layers, an application structure made of high heat resistant super alloys on a substrate is provided. A powdery construction material is melted by an energy beam at a working point, wherein the working point is guided across the substrate along a primary movement direction and thus swings transversely to the primary movement direction. The working point thereby swings from a first edge of a respective layer of the application structure to a second edge of the layer. In this way, a time interval passes between departure from a respective edge and a return to the respective edge directly following the departure, such that a melt bath on the respective edge solidifies into a paste-like zone during the time interval.

Abstract: An oscillating welding method is provided. The oscillating movement during welding in the vertical and/or horizontal direction results in smaller grains being obtained, the smaller grains preventing the development of cracks during welding.

Abstract: A process for welding directionally solidified metallic materials is presented. Process parameters are targeted selected with respect to laser welding, advancement, laser power beam diameter and powder mass flow. The temperature gradient, which is fundamentally decisive for the single-crystal growth during laser cladding, may be set in a targeted manner.

Abstract: A method of welding workpieces of high-temperature superalloys is provided. Welding filler is applied in a plurality of layers to a surface of the workpiece via a heat input zone and a supply zone for supplying the welding filler into the heat input zone. The heat input zone and the supply zone on the one hand and the workpiece surface on the other hand are moved in relation to one another. A polycrystalline weld seam is generated by remelting a previously applied layer of the plurality of layers. Welding parameters are chosen such that a cooling rate during a solidifying of the material is at least 8000 Kelvins per second. Further, a welding apparatus for carrying out such a method is provided.

Abstract: A welding method for welding workpieces made of highly heat-resistant superalloys is provided. The method includes generating a heat input zone on the workpiece surface by means of a heat source, feeding welding filler material into the heat input zone by means of a feeding device, and generating a relative motion between the heat source and the feeding device on one hand and the workpiece surface on the other hand by means of a conveying device. Furthermore, according to the welding method, the mass feed rate is ?350 mg/min.

Abstract: In order to obtain crack-free, homogeneous welds in nickel-based superalloys, laser parameters in respect of the power, the beam diameter, the mass feed rate, and the speed of advancement, are specifically selected.

Abstract: By way of the targeted selection of method parameters in laser welding, namely feed rate, laser power beam diameter and powder mass flow, the temperature gradient can be set in a targeted manner, which temperature gradient is decisive for the single crystal growth during laser build-up welding.

Abstract: A process for welding a component in which a recess is filled by welding tracks is provided. The process includes providing a recess with a contour which delimits an outer upper surface of the component with respect to the recess. The welding tracks are laid such that the welding tracks also reach the surface outside a contour of the recess and that a plurality of welding layers are used in order to fill the recess until a last layer protrudes completely beyond the surface.

Abstract: A method for deposition of at least one electrically conducting film on a substrate, wherein the method includes the steps of: selecting a layer of a film material, wherein the layer includes a mask on a front side, and wherein the layer and the mask are one piece; positioning the front side of the layer upon the substrate; applying at least one laser pulse onto a back side of the layer, so as to melt and to vaporize at least parts of the layer such that melt droplets are propelled toward and deposited upon the substrate; and forming the film, wherein at least one slot of the mask limits the distribution of the melt droplets.

Abstract: A process for welding directionally solidified metallic materials is presented. Process parameters are targeted selected with respect to laser welding, advancement, laser power beam diameter and powder mass flow. The temperature gradient, which is fundamentally decisive for the single-crystal growth during laser cladding, may be set in a targeted manner.

Abstract: A welding apparatus for welding workpieces of high-temperature superalloys is provided. The welding apparatus includes a heat source for producing a heat input zone on the workpiece surface, a supplying device for supplying welding filler into the heat input zone and a transporting device for producing a relative movement between the heat source and the supplying device on the one hand and the workpiece surface on the other hand. The welding apparatus further includes a control unit with a control program, which carries out the relative movement in such a way that the welding power and the diameter of the heat input zone are set such that the cooling rate during the solidifying of the material is at least 8000 Kelvins per second.

Abstract: A method for directionally compacting a weld seam during build-up welding is provided. The method is used for the build-up welding of a component substrate that is compacted in a directional manner and comprises dendrites which extend in a substrate dendrite direction. The method parameters with respect to feed, laser power, weld beam diameter, powder beam focus and/or powder mass flow are designed such that they result in a local orientation of the temperature gradient to the solidification front, which is smaller than 45° with respect to the substrate dendrite direction of the dendrites in the substrate, wherein the relative speed is between 30 mm/mm and 100 mm/mm, and/or the power is between 200 W and 500 W, and/or the diameter of the laser beam on the surface of the substrate is between 3 mm and 6 mm, and/or the mass feed rate is between 30 mg/mm and 600 mg/mm.