Narrow gap hybrid welding of thick stainless steel

Tommi Jokinen, Miikka Karhu, Veli Kujanpää

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    3 Citations (Scopus)


    Hybrid welding, in which laser and some arc welding method work together, has been introduced to be effective joining method. Hot spot, made by laser to the joint, has been reported to stabilize the arc and change the way of material transfer in arc. Hot spot is also guiding the arc towards to it. This phenomenon has been utilized in this study in order to get the process to be happened inside a very narrow groove. In this way, together with multipass technique, the thickness of the parts to be welded can be increased. Welding still happens with quite low total heat input and according to that, method can be used for joining thick sections with very low distortions. Also phenomena of laser keyhole welding still take place, so method is very effective to joining thick sections. In this study thick section austenitic stainless steel has been welded using multipass technique and hybrid process; Nd:YAG -laser + GMAW. Welding has been done using partially grooved V joint geometry and narrow gap with groove angle of 10 degrees. Parameters, for example in filler wire feeding and placement of the wire and the arc are varied. Results of experiments are presented and a phenomenon of the process is discussed.
    Original languageEnglish
    Title of host publicationICALEO 2003: 22nd International Congress on Laser Materials Processing and Laser Microfabrication
    PublisherLaser Institute of America
    ISBN (Print)978-0-912035-75-8
    Publication statusPublished - 2003
    MoE publication typeA4 Article in a conference publication
    Event22nd International Congress on Applications of Lasers and Electro-Optics, ICALEO 2003 - Jacksonville, United States
    Duration: 13 Oct 200316 Oct 2003


    Conference22nd International Congress on Applications of Lasers and Electro-Optics, ICALEO 2003
    Country/TerritoryUnited States


    • hybrid welding
    • narrow gap
    • Nd:YAG-laser
    • laser welding


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