Laser welding process especially for compressor blades for a gas turbine cleans weld region with defocused beam before welding with the same beam that is focused

摘要

A laser welding process, especially for compressor blades for a gas turbine having metal sheets connected to a fiber bound core, comprises pre-cleaning the weld region with a defocused laser beam spot of given size and heating effect, traversing at a given speed and then welding with the same but now focused beam.