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Laser cladding with coaxial wire feeding

: Pajukoski, H.; Näkki, J.; Thieme, S.; Tuominen, J.; Nowotny, S.; Vuoristo, P.

Washio, Kunihiko ; Laser Institute of America -LIA-:
ICALEO 2012, 31st International Congress on Applications of Lasers & Electro-Optics. Congress proceedings. CD-ROM : September 23-27, 2012, Anaheim, CA, USA
Orlando, Fla.: LIA, 2012 (LIA publication 615)
ISBN: 978-0-912035-96-3
Paper P124, 6 pp.
International Congress on Applications of Lasers & Electro Optics (ICALEO) <31, 2012, Anaheim/Calif.>
Conference Paper
Fraunhofer IWS ()
laser cladding; wire cladding; coaxial laser head; coaxial material feeding; Inconel 625 coating

In the last years coaxial laser heads have been developed with centric wire feeding equipment which enables the laser processing of complex shaped objects in different applications. These newly developed laser heads are being used in laser brazing experiments in the automotive industry. This paper presents experimental results of using a coaxial laser head for wire cladding application. The coaxial wire cladding method has significant improvements compared to the off-axis wire cladding method, such as independence of the travel direction, alignment of the wire to the laser beam and a reduced number of controlling parameters. These features are important to achieve high quality coatings. Experimental cladding tests were done with a coaxial laser wire welding head at Fraunhofer IWS. High quality corrosion resistant coatings with low dilution were produced using Inconel 625 solid wire.