Plasma Control and Gas Protection System for Laser Welding of Stainless Steel

Thomas Winther Juhl, Flemming Ove Olsen, Kaj Petersen

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

    Abstract

    An integrated plasma nozzle and a shield gas box have been investigated for laser welding of 2 mm stainless steel sheets. Different gases for plasma control and gas protection of the weld seam have been used. The gas types, welding speed and coaxial and plasma flow show the impact on process stability and protection against oxidation. Also oxidation related to special conditions at the starting edge has been investigated. The interaction between coaxial and plasma gas flow show that the coaxial flow widens the band in which the plasma gas flow suppresses the metal plasma. In this band the welds are oxide free. With 2.7 kW power welds have been performed at 3000 mm/min with Ar / He (70%/30%) as coaxial, plasma and shield gas.
    Original languageEnglish
    Title of host publicationProceedings of the 6th NOLAMP Conference
    EditorsClaes Magnusson, Hans Engström
    Place of PublicationLuleå
    PublisherUniversity of Luleå
    Publication date1997
    Pages150-155
    Publication statusPublished - 1997
    Event6th Nordic Laser Material Processing Conference - Luleå, Sweden
    Duration: 27 Aug 199729 Aug 1997
    Conference number: 6

    Conference

    Conference6th Nordic Laser Material Processing Conference
    Number6
    CountrySweden
    CityLuleå
    Period27/08/199729/08/1997

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