WELD SEAM FORMATION AND MECHANICAL PROPERTIES OF GIRTH WELDS PERFORMED WITH LASER-GMA-HYBRID PROCESS ON PIPES OF GRADE X65

摘要

With the recent introduction of multi-kilowatt fiber lasers combining high beam quality with an impressive energy efficiency, it was possible to broaden the spectrum of laser beam and laser-hybrid welding applications widely. Application of these lasers for welding thick-walled structures in different branches of industry (e.g. power generation, shipbuilding, wind power, pipeline construction) is interesting, because the fiber lasers offer sufficient penetration depth to allow economically efficient welding of thick sheet metal, i.e. with a reduced number of welding passes and with a lower amount of filler material.