Comparison of the Laser and Electron Beam Welding of Steel Sheets Treated by Nitro-Oxidation

    Volume 9, Issue 2 (February 2012)

    ISSN: 1546-962X

    CODEN: JAIOAD

    Published Online: 10 November 2011

    Page Count: 10


    Marônek, Milan
    Slovak Univ. of Technology,

    Bárta, Jozef
    Slovak Univ. of Technology,

    Bártová, Katarína
    Slovak Univ. of Technology,

    (Received 14 September 2010; accepted 18 October 2011)

    Abstract

    Nitro-oxidized steel specimens welded by a CO2 laser and an electron beam were examined for quality and integrity by visual inspection, microstructure, and microhardness analysis. Visual inspection of the specimens welded by laser revealed the lack of root penetration at maximal welding speed from the selected welding speed range (30 to 60 mm/s) and a neat weld at the welding speed of 40 mm/s. However, in comparison to laser beam welding, the electron beam welding (EBW) process produced the weld joints with a wider heat affected zone, while the weld joints were much more prone to porosity. The microstructure of the weld joints made by both the laser beam welding and EBW methods did not show any abnormalities in phase composition owing to the presence of nitrides in the surface layer of the materials welded after nitro-oxidation.


    Paper ID: JAI103375

    DOI: 10.1520/JAI103375

    ASTM International is a member of CrossRef.

    Author
    Title Comparison of the Laser and Electron Beam Welding of Steel Sheets Treated by Nitro-Oxidation
    Symposium , 0000-00-00
    Committee A01