Method and device for laser build-up welding with variable layer thickness

A method for laser deposition welding in a laser system, the method comprising:

• actuating a processing unit having a multifunctional jet nozzle for providing a laser beam and a powder jet, so that the powder jet, in interaction with the laser beam, deposits a powder-layer trace onto a workpiece;
• actuating a workpiece receiving unit, on which the workpiece is arranged, so that a rotational movement moves the workpiece about an axis of rotation;
• and
• actuating a translation unit, so that a translational movement moves the jet nozzle and/or the workpiece receiving unit in an offset direction substantially orthogonal to the axis of rotation;
• wherein the rotational movement and the translational movement combine to form an advancing movement such that the powder-layer trace is deposited onto the workpiece along a spiral path, and
• wherein a processing parameter varies as processing of the workpiece progresses, so that a powder layer thickness varies along a radial direction of the workpiece.