Abstract: The invention relates to an ozone supply unit (26) for a flame burner apparatus and/or an oxygen cutting apparatus (10), comprising an oxygen inlet (28) to be supplied with oxygen (18), an ozone generator (32) coupled to the oxygen inlet (28) and configured to convert at least a part of the oxygen (18) supplied to the oxygen inlet (28) into ozone (18a), and an outlet (30) coupled to the ozone generator (32), wherein the outlet (30) provides at least a part of the oxygen (18) supplied to the oxygen inlet (28) and at least a part of the ozone (18a) converted by the ozone generator (32). The ozone supply unit (26) is configured to be integrated into a flame burner apparatus and/or an oxygen cutting apparatus (30). The invention further relates to a method for supplying ozone to a flame burner apparatus and/or an oxygen cutting apparatus (30).

Abstract: The invention relates to a method for producing, in particular generatively producing, and coding a three-dimensional component. Said method comprises the following steps: providing a starting material, supplying a process gas to the starting material, melting the starting material by means of a heat source, and repeating the aforementioned steps. The method according to the invention is characterized in that, at least at a predetermined time interval during the melting of the starting material, a coding component or a coding gas containing a coding component is added to the process gas such that the use of the coding component in the finished object is detectable, and coding information is logged which describes the coding information and the location thereof in the component.

Abstract: The invention relates to a method for coding metal powder. Said method comprises the following steps: providing a melt, forming a melt stream, spraying the melt stream by means of a spraying fluid, and forming metal powder particles from the melt stream. The method is characterized in that, during the spraying of the melt and/or the spraying fluid, a coding component or a coding gas is added in such a way that the use of the coding component in the metal powder can be detected, wherein the gaseous coding component comprises one or more isotopes of at least one gas and the fraction of the at least one isotope is changed in comparison with the naturally occurring fraction of said isotope in the gas and/or wherein the gaseous coding component contains gaseous alloying elements.

Abstract: A method for flame straightening is disclosed, wherein acetylene with oxygen is combusted by means of a burner to yield a flame, and the flame is directed onto a workpiece so as to heat the workpiece, wherein an electric field is applied between the burner and the non-melting workpiece which is electrically conductive, or the electric field is applied between the burner and a non-melting electrode arranged on the non-melting workpiece side to reduce NOx emission.

Abstract: The invention relates to a fumigant formulation comprising a mixture of ethyl formate dissolved in supercritical carbon dioxide.

Abstract: A method of cleaning a workpiece after a welding process is provided, wherein the cleaning is conducted by removing oxide from the surface of the workpiece which is formed on the weld and the heat-affected zone of the workpiece during the previous welding process, wherein an electric arc is generated between the workpiece and a non-consumable electrode to remove the oxide on the workpiece, wherein a power source is provided to electrically communicate the workpiece and the non-consumable electrode and wherein the non-consumable electrode is anodic connected and the workpiece is cathodic connected.

Abstract: The invention relates to an ozone supply unit (26) for a flame burner apparatus and/or an oxygen cutting apparatus (10), comprising an oxygen inlet (28) to be supplied with oxygen (18), an ozone generator (32) coupled to the oxygen inlet (28) and configured to convert at least a part of the oxygen (18) supplied to the oxygen inlet (28) into ozone (18a), and an outlet (30) coupled to the ozone generator (32), wherein the outlet (30) provides at least a part of the oxygen (18) supplied to the oxygen inlet (28) and at least a part of the ozone (18a) converted by the ozone generator (32). The ozone supply unit (26) is configured to be integrated into a flame burner apparatus and/or an oxygen cutting apparatus (30). The invention further relates to a method for supplying ozone to a flame burner apparatus and/or an oxygen cutting apparatus (30).

Abstract: The invention relates to a method for producing, in particular generatively producing, and coding a three-dimensional component. Said method comprises the following steps: providing a starting material, supplying a process gas to the starting material, melting the starting material by means of a heat source, and repeating the aforementioned steps. The method according to the invention is characterized in that, at least at a predetermined time interval during the melting of the starting material, a coding component or a coding gas containing a coding component is added to the process gas such that the use of the coding component in the finished object is detectable, and coding information is logged which describes the coding information and the location thereof in the component.

Abstract: The invention relates to a method for coding metal powder. Said method comprises the following steps: providing a melt, forming a melt stream, spraying the melt stream by means of a spraying fluid, and forming metal powder particles from the melt stream. The method is characterized in that, during the spraying of the melt and/or the spraying fluid, a coding component or a coding gas is added in such a way that the use of the coding component in the metal powder can be detected, wherein the gaseous coding component comprises one or more isotopes of at least one gas and the fraction of the at least one isotope is changed in comparison with the naturally occurring fraction of said isotope in the gas and/or wherein the gaseous coding component contains gaseous alloying elements.

Abstract: A method for flame straightening is disclosed, wherein acetylene with oxygen is combusted by means of a burner to yield a flame, and the flame is directed onto a workpiece so as to heat the workpiece, wherein an electric field is applied between the burner and the non-melting workpiece which is electrically conductive, or the electric field is applied between the burner and a non-melting electrode arranged on the non-melting workpiece side to reduce NOx emission.

Abstract: A method for processing powdered starting materials includes a powdered material created and packaged under a protective gas atmosphere such that a protective gas is also present in the package, and the packaged powdered material is unpacked by a user and sent for further processing, wherein a gas detectable with sensors is supplied to the protective gas during packaging and/or in the packaging, or the protective gas is a gas that can be detected with sensors and the manufacturer and packager of the powdered material and/or the end user will examine the package with sensors to detect an escape of the detectable gas.

Abstract: A method for the generative production of a three-dimensional component includes providing a metallic starting material in the form of a powder bed in a substantially horizontal starting plane, supplying a process gas to the starting material, melting the starting material by a heat source, repeating the above steps, wherein at least a portion of the process gas is supplied through the powder bed. A related device is also provided.

Abstract: A method of manufacturing an article comprising titanium and/or titanium alloy using an additive manufacturing method comprising: providing a substrate; providing a feedstock; and fusing the feedstock to the substrate using a heat source, wherein the substrate and/or feed stock comprises titanium and/or titanium alloy, and the fusing is conducted under a shielding gas comprising an inert gas and an oxidant gas.

Abstract: A method of metal inert-gas welding is proposed, a method in which a welding filler (1) is fed to a welding torch (10) and a welding current of a welding current source (30) is applied via a welding current connection (5), whereby an arc (7) is formed and, in a welding region, material of the welding filler (1) is transferred to a workpiece (20) consisting at least in the welding region of an alloyed high-grade steel. By means of the welding torch (10), an inert gas that includes a content of 0.5 to 3.0 percent by volume of at least one oxidizing component and a content of 0.1 to below 0.5 percent by volume of hydrogen is fed to the welding region. A method of reducing the content of nickel oxides and chromium (VI) compounds in welding fumes of such a welding method, a corresponding inert gas and the use of a gas mixture as an inert gas are likewise the subject of the present invention.

Abstract: A gas mixture, a pressure tank containing the gas mixture, a method that uses the gas mixture during thermal spraying, cutting, joining, deposition welding and/or surface treatment by means of arcs, plasma and/or lasers, a device for preparing the gas mixture and a method for manufacturing the gas mixture are disclosed, wherein the gas mixture contains a protective gas and a protective gas additive selected from the group of ethers, cyclic amines containing at least one ether group, and mixtures thereof.

Abstract: A method is provided for the gas assisted laser cutting of a metal, metal ahoy, plastic material, composite, ceramic or wooden workpiece with laser light of a wavelength between 300 nm and 2500 nm utilising carbon dioxide as the assist gas. Alternatively, an assist gas supply system is provided wherein a source of assist gas selected from the group consisting of one or more single gas cylinders, connected gas cylinders and gas cylinder bundles is used for supplying the assist gas to a gas assisted laser cutting device able to perform laser cutting.

Abstract: A welding torch having guidance means designed to advance a wire-like welding filler material mechanically along an axis at least in a section of the welding torch, a process gas nozzle that coaxially surrounds at least the guidance means, and a welding current connector that is connected in electrically conductive manner to an element of the welding torch that is configured to conduct electrical current. A hollow electrode is provided that surrounds the axis coaxially and as the element configured for conducting current is connected in electrically conductive manner to the welding current connector, wherein the guidance means are designed to advance the wire-like welding filler material in potential free manner. The welding torch may be used as part of a welding apparatus for a variety of welding methods.

Abstract: A method of gas-shielded metal arc joining using a consumable electrode having an alternating polarity (GMA-AC). A shielding gas containing argon is used to improve process stability and working speed.

Abstract: The invention pertains to a thermal cutting method, in which a cutting gas is introduced into a cutting nozzle and guided onto the work piece to be processed by means of the cutting nozzle, wherein the invention is characterized in that multiple changes of the cutting gas composition are realized during the cutting process.

Abstract: According to the invention a welding device for welding workpieces is provided. The welding device comprises a welding means for making a welding seam on workpieces and a cleaning nozzle in order to emit a cryogenic medium onto the surfaces of the workpieces in the area of their welding seam to be formed. The distance between the welding means and the nozzles is at least 5 cm.