Manual repair welding is carried out using a pulsed laser, with the workpiece positioned under a microscope. The appropriate alloy and diameter of filler metal is then selected according to the damage and function of the workpiece.
The significant advantage of laser welding is the low amount of heat influence on the workpiece. This is because of the very short pulse duration and relatively slow succession of welding pulses, which keeps the heat influence zone very small. As a result, there are scarcely any structural changes in the workpiece and it retains its dimensional accuracy. This greatly reduces the amount of subsequent corrective work needed.