Abstract: A jet nozzle for laser deposition welding along a feed direction includes a light channel for guiding at least one laser beam that is directed onto a workpiece, and an outer structure that surrounds the light channel at least in sections and extends from a flange portion to a distal region, which is formed by a nozzle mouth and from which the laser beam emerges. The outer structure includes a cooling system, which has a radially inner cooling chamber at least in sections and a radially outer cooling chamber at least in sections, through which a coolant flows.

Abstract: A jet nozzle for laser deposition welding in an advance direction includes a light channel for guiding at least one laser beam to be directed at a workpiece, and a powder unit arranged radially outside the light channel for guiding at least one powder jet to be applied to the workpiece. The powder unit forms a powder portion in a peripheral direction around the light channel. The jet nozzle further includes a process-gas unit arranged radially outside the light channel for guiding a process gas. The process-gas unit forms a process-gas portion in the peripheral direction. The process-gas portion adjoins the powder portion at a nozzle mouth in the peripheral direction.

Abstract: A jet nozzle for laser cladding along a direction of advance includes a light channel for conducting at least one laser beam directed onto a workpiece, and a powder unit located radially outside the light channel for conducting at least one jet of powder to be applied to the workpiece. The powder unit forms a powder section at a mouth of the jet nozzle in a circumferential direction about the light channel. An advance section that is devoid of the powder unit is contiguous thereto in the circumferential direction.

Abstract: A jet nozzle for laser cladding along a direction of advance includes a light channel for conducting at least one laser beam directed onto a workpiece, and a powder unit arranged radially outside the light channel for conducting at least one jet of powder to be applied to the workpiece. A cross-sectional area of the light channel that is orthogonal to a longitudinal direction of the jet nozzle deviates from a circular shape and is oblong in the direction of advance.

Abstract: A jet nozzle for laser cladding along a direction of advance includes a light channel for conducting at least one laser beam directed onto a workpiece, and an outer structure surrounding the light channel at least in sections. The outer structure extends from a flange portion to a distal region that is formed by a mouth of the jet nozzle from which the at least one laser beam exits. The light channel forms an absorption portion for absorbing back-reflected radiation of the at least one laser beam from the workpiece.