Abstract: The invention relates to a method for joining objects made of metal, plastic, hybrid structures or ceramic by means of heat input such as soldering or welding, wherein materials such as particles, in particular nanoparticles, elements, atoms, molecules or ions are introduced into the joint. It is proposed according to the invention that a gas stream brings gaseous compounds to the joint which decompose at elevated temperature and deposit particles as heat is being applied to the joint.

Abstract: The invention relates to a method for joining objects made of metal, plastic, hybrid structures or ceramic by means of heat input such as soldering or welding, wherein materials such as particles, in particular nanoparticles, elements, atoms, molecules or ions are introduced into the joint. It is proposed according to the invention that a gas stream brings gaseous compounds to the joint which decompose at elevated temperature and deposit particles as heat is being applied to the joint.

Abstract: The invention relates to a method for joining objects made of metal, plastic or ceramic by means of heat input such as soldering or welding, wherein materials such as particles, in particular nanoparticles, elements, atoms, molecules or ions are introduced into the joint. It is proposed according to the invention that a gas stream brings gaseous compounds to the joint which decompose at elevated temperature and deposit particles.

Abstract: The invention relates to a method for joining objects made of metal, plastic or ceramic by means of heat input such as soldering or welding, wherein materials such as particles, in particular nanoparticles, elements, atoms, molecules or ions are introduced into the joint. It is proposed according to the invention that a gas stream brings gaseous compounds to the joint which decompose at elevated temperature and deposit particles.

Abstract: The invention relates to a method for joining objects made of metal, plastic or ceramic by means of heat input such as soldering or welding, wherein materials such as particles, in particular nanoparticles, elements, atoms, molecules or ions are introduced into the joint. It is proposed according to the invention that a gas stream brings gaseous compounds to the joint which decompose at elevated temperature and deposit particles.

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, and in which the volumetric flow rate of the cutting gas is at least reduced in a periodically repeating fashion, wherein the invention is characterized in that the method is carried out with a periodicity that has a frequency between 700 Hz and 8000 Hz.

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: A gas mixture for laser beam fusion cutting is disclosed. The gas mixture essentially contains N2 and smaller fractions of O2 and H2. The gas can be produced in an extremely cost-effective manner by the enrichment of a starting product consisting of impure nitrogen that contains 1-6% O2 with H2.

Abstract: A nozzle with at least one central nozzle channel through which at least one jet intended for flame, for laser beam and/or for the arc welding and at least one gas flow can be guided, wherein the contour of the nozzle channel has two curves which merge into each other directly or via an intermediate straight, of which curves the in direction of the gas flow first curve seen from the central axis of the nozzle channel extending in direction of the gas flow is curved in a concave manner and the direction of the gas flow second curve seen from the central axis of the nozzle channel is curved in a convex manner, so that the gas flow flows out of the gas outlet within at least one wide pressure range in a laminar manner and without pressure relaxation even on changing of the gas pressure.

Abstract: The invention relates to a method for thermal cutting, wherein a cutting gas is piped into a cutting nozzle and guided on to a work piece to be processed by means of the cutting nozzle. According to the invention the cutting gas is at least reduced in a periodically repetitive manner wherein the time in which the cutting gas is guided onto the work piece in an undiminished manner is shorter than half of a period. In addition the invention relates to a corresponding device with a valve.

Abstract: A method for laser beam welding with a fiber laser is provided. A process gas containing an active gas is directed to the machining point. Carbon dioxide, oxygen, hydrogen, nitrogen, or a mixture of said gases are particularly suitable as active gases. The process gas advantageously also contains helium and/or argon.

Abstract: A method for laser welding by a fiber laser, according to which a process gas containing helium is directed to the processing point.

Abstract: The invention relates to a device for laser welding, especially for scanner welding using quilting seams. In order to maintain the welding points under inert gas during said method, the inventive device comprises a vat with an inert gas supply.

Abstract: A process gas and a process of laser machining, such as laser beam fusion cutting or laser beam welding is provided. A gas mixture that contains at least oxygen and hydrogen, in addition to an inert has, is used as the process gas. The ratio of oxygen to hydrogen in the process gas is hypostoichiometric with respect to the reaction 2 H2+O2+?2 H2O, which causes the process gas to exhibit a reductive effect.

Abstract: The invention relates to a process gas for use during laser welding of nonferrous metallic workpieces with a laser beam focussed onto the workpiece to be welded and a laser diode as the laser beam source. According to the invention, the process gas contains at least carbon dioxide and/or oxygen. The process gas can, in addition to carbon dioxide and/or oxygen, also contain argon, nitrogen, helium and/or other precious gases.

Abstract: The invention relates to a process gas and a process of laser machining, such as laser beam fusion cutting or laser beam welding. According to the invention, a gas mixture that contains at least oxygen and hydrogen, in addition to an inert gas, is used as the process gas. Advantageously, the ratio of oxygen to hydrogen in the process gas is hypostoichiometric with respect to the reaction 2 H2+O2→2 H2O, as then the process gas will produce a reductive effect.

Abstract: A method of carburizing a metal workpiece and a carburizing apparatus in which the workpiece, generally of steel, is introduced into an annealing oven and subjected to a high temperature in the presence of a carbon-containing gas mixture as a result of which the workpiece is hardened. According to the invention, one or more of the carbon-containing gas components of the mixture effective upon the surface of the work-piece, can be periodically and impulsively injected into the gas mixture for sudden increases in carbon potential followed by longer diffusion phase.