Defects of Steel Sheets Joined by Laser Welding

Abstract:

Introduction of new technologies demands a new access to quality evaluation of products. Joining of steel sheets with laser butt welding requires increased demand on precision of welded sheet ends alignment as well as condition of cutting edge. Moreover, increased requirements are placed on purity of environment, flatness of strips, gases, etc. The paper deals with evaluation of quality of laser butt welds of steel sheets and description of defects which could occur on welds from the metallographic point of view. The influence of relative displacement of welded strips ends alignment, different relative sheet thickness alignment, welding gap size and quality of sheet shear edge on quality of weld will be described. The most significant effect on quality of weld joints and their final mechanical properties has relative position of strip ends and geometry of cutting edge.

• Periodical: Defect and Diffusion Forum (Volume 405)
• Pages: 240-244
• DOI: https://doi.org/10.4028/www.scientific.net/DDF.405.240
• Online since: November 2020
• Authors: Atila Drotár*, Pavol Zubko, Alicia Mašlejová, Peter Kalmár, Peter Vranec, Slavka Hockicková, Mária Demčáková, Lucia Hrabčáková
• Keywords: Laser Welds, Sheet Ends Alignment, Steel Sheets, Weld Defects

References

[1] N. Matsumoto, Y. Kawahito, K. Nishomoto, S. Katayama, Effects of laser focusing properties on weldability in high-power fiber laser welding of thick high-strength steel plate. Journal of laser application, Volume 29, Number 1, (2017).

DOI: 10.2351/1.4966258

[2] TRUMP Group, The Laser as a Tool., Vogel Buchverlag, Wurzburg (2007).

[3] STN EN ISO 1011-2, Zváranie. Odporúčania na zváranie kovových materiálov. Časť 2: Oblúkové zváranie feritických ocelí.

[4] STN EN ISO 6520 – 1, Zváranie a príbuzné procesy. Zatriedenie chýb zvarových spojov kovových materiálov. [in Slovak].

[5] I. Hrivňák, Zváranie a zvariteľnosť materiálov, vydavateľstvo Citadella (2013). [in Slovak].