CO2-GMA hybrid welding of carbon steel: The effect of shielding gas composition

A. Fellman, P. Jernström, Veli Kujanpää

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

    14 Citations (Scopus)

    Abstract

    Metal industry producing large structures is nowadays very interested in hybrid welding processes. That isn’t a surprise, as the process has many advantages compared to the conventional welding methods. One of the major benefits is the reduction in deformations. That reduces the post-work needed and makes the assembly easier since the hybrid welded parts are more accurate. Another advantage of hybrid welding is that it allows much wider groove tolerances compared to laser welding. In addition, with filler metal the composition can be balanced, if metallurgical factors are critical.
    In this study CO2-GMA hybrid welding process was used. The aim was to clarify the effects of shielding gas composition on welding performance, weld profile and quality in hybrid welding of carbon steel. Shielding gases used consisted of helium, argon and carbon dioxide. Joint types used were butt and T-butt joints.
    The research revealed that the composition of shielding gas affects welding performance, weld quality and penetration profile in CO2-GMA hybrid welding of carbon steel. Hybrid welds of a good quality can be produced with many different shielding gas compositions, but if the productivity, low gas costs, reliability of the process and high quality are desired, the shielding gas composition does make a difference in hybrid welding of carbon steel.
    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
    DOIs
    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

    Conference

    Conference22nd International Congress on Applications of Lasers and Electro-Optics, ICALEO 2003
    CountryUnited States
    CityJacksonville
    Period13/10/0316/10/03

    Keywords

    • welding

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