The invention relates to an apparatus for laser-deposition welding with multiple laser-deposition welding heads and to a method for operating such an apparatus comprising a laser-deposition welding unit with multiple laser-welding heads arranged thereon for the (quasi-) simultaneous depositing of material (M) onto a surface of a component and also comprising one or more conveying units for supplying the laser-deposition welding heads with the material (M) to be applied and further comprising one or more laser-radiation sources for supplying the laser-deposition welding heads with laser radiation (L) for carrying out the laser-deposition welding.

A high strength and corrosion resistant ferrochrome alloy bulk is disclosed, which comprises, in weight percent: 30-68% Cr, 1.5-8% Ni, 1.6-6% C, and the balance Fe and incidental impurities, of which a Fe/Ni ratio is in a range from 5 to 10 and a Cr/C ratio is in a range between 10 and 33. Experimental data reveal that, samples of the high strength and corrosion resistant ferrochrome alloy bulk all possess hardness above HV400 and excellent corrosion resistance due to the high content of Cr. As a result, experimental data have proved that the high-strength and corrosion-resistant ferrochrome alloy bulk of the present invention has a significant potential to replace conventional high-strength stainless steels, so as to be widely applied in various industrial fields, e.g., aviation, transportation, marine facility components, chemical equipment and pipe fittings, engine parts, turbine blades, valves, bearings, building materials, and so on.

The invention relates to a method for repairing a damaged blade tip of a turbine blade which is armor-plated and provided with a blade coating, of a thermal gas turbine. The method according to the invention comprises the steps of removing a blade tip armor plating of the turbine blade at least in the region of the damaged blade tip and producing a repair surface (12), removing only a part of the blade coating of the turbine blade in the region of the repair surface while preserving a part of the blade coating separated from the repair surface (14), restoring the blade tip reinforcement (20), and restoring the blade coating in the region of the repaired blade tip (22). The invention furthermore relates to a device for carrying out such a method.

The invention relates to a method for repairing a damaged blade tip of a turbine blade which is armor-plated and provided with a blade coating, of a thermal gas turbine. The method according to the invention comprises the steps of removing a blade tip armor plating of the turbine blade at least in the region of the damaged blade tip and producing a repair surface (12), removing only a part of the blade coating of the turbine blade in the region of the repair surface while preserving a part of the blade coating separated from the repair surface (14), restoring the blade tip reinforcement (20), and restoring the blade coating in the region of the repaired blade tip (22). The invention furthermore relates to a device for carrying out such a method.

An apparatus for carrying out a method for producing an object using selective powder melting and by building up layers of powder material. The apparatus includes a build chamber configured to accommodate the object being produced and a powder delivery device equipped with a powder storage container and configured to supply material powder into the build chamber, a powder layer preparation unit to prepare successive layers of the supplied material powder on a substrate arranged in the build chamber, an irradiation device configured to irradiate a prepared powder layer to thereby melt the prepared powder layer locally, and a protective gas circulation device configured to circulate a protective gas present in the build chamber. At least one air conditioning device is also included and is configured to condition one or more of a temperature or a humidity of the protective gas circulated by the protective gas circulation device.

An apparatus for carrying out a method for producing an object using selective powder melting and by building up layers of powder material. The apparatus includes a build chamber configured to accommodate the object being produced and a powder delivery device equipped with a powder storage container and configured to supply material powder into the build chamber, a powder layer preparation unit to prepare successive layers of the supplied material powder on a substrate arranged in the build chamber, an irradiation device configured to irradiate a prepared powder layer to thereby melt the prepared powder layer locally, and a protective gas circulation device configured to circulate a protective gas present in the build chamber. At least one air conditioning device is also included and is configured to condition one or more of a temperature or a humidity of the protective gas circulated by the protective gas circulation device.

Methods and apparatuses for additive manufacturing are described. A method for additive manufacturing may include exposing a layer of material on a build surface to one or more projections of laser energy including at least one line laser having a substantially linear shape. The intensity of the line laser may be modulated so as to cause fusion of the layer of material according to a desired pattern as the one or more projections of laser energy are scanned across the build surface.

A 3-dimensional shaping apparatus manufactures a 3-dimensional shaped object. The 3-dimensional shaping apparatus includes a beam irradiation unit, a spatial light modulator, a splitting optical system, and a scanning unit. The beam irradiation unit emits a light beam. The spatial light modulator spatially modulates the light beam emitted by the beam irradiation unit at least on the first axis. The splitting optical system includes at least one lens array having a plurality of lenses arranged along the first axis and splits the light beam modulated by the spatial light modulator into a plurality of light beams by the lens array. The scanning unit scans the shaping material with the plurality of light beams from the splitting optical system.

A 3-dimensional shaping apparatus manufactures a 3-dimensional shaped object. The 3-dimensional shaping apparatus includes a beam irradiation unit, a spatial light modulator, a splitting optical system, and a scanning unit. The beam irradiation unit emits a light beam. The spatial light modulator spatially modulates the light beam emitted by the beam irradiation unit at least on the first axis. The splitting optical system includes at least one lens array having a plurality of lenses arranged along the first axis and splits the light beam modulated by the spatial light modulator into a plurality of light beams by the lens array. The scanning unit scans the shaping material with the plurality of light beams from the splitting optical system.

Described herein are examples of weld training systems that show (e.g., transparent and/or translucent) “ghost” images of a welding tool on a display screen of a welding headgear to indicate target positions and/or target orientations of an actual welding tool. In some examples, the weld training systems may additionally “reset” the target tool image to a position closer to the actual welding tool if the target tool image gets too far away. The ability to “reset” the target tool image to a position closer to the actual welding tool may help in minimizing a risk that an operator 106 will overcompensate to try to catch up with the target tool image, which can be detrimental to the weld. Additionally, resetting the target tool image to a position closer the welding tool may allow an operator to better perceive and/or understand differences in orientation and/or other technique parameters.