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45 mm thick steel section joining for cold climate applications by applyinglaser-arc hybrid welding
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Product and Production Development. (Produktionsutveckling)ORCID iD: 0000-0003-4265-1541
Norwegian University of Science and Technology, Department of Engineering Design and Materials. (Produktionsutveckling)
Norwegian University of Science and Technology, Department of Engineering Design and Materials.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Product and Production Development. (Produktionsutveckling)ORCID iD: 0000-0002-3569-6795
2018 (English)In: 71st IIW International Conference, 2018Conference paper, Published paper (Refereed)
Abstract [en]

Production and joining of components for energy industries(wind, oil and gas) for cold climate applications is achallenging task. Joining of thick steels is usually performedby using arc techniques such as submerged arc welding(SAW) or Gas Metal Arc Welding (GMAW). To fill thicksections, wide gap preparation is made and gradually filled inseveral weld passes. To reduce the number of weld passes,high power laser-arc hybrid welding (LAHW) is a promisingalternative, but can also weld at higher travel rates therebyreducing the total heat input and reduced filler material.LAHW is applied using a metal-cored wire, demonstratingwelding in 45 mm thick steel sheets. Setup and selection ofprocess parameters are essential for obtaining high processstability, penetration efficiency and material mixingthroughout the depth of the weld. Each weld where repeatedand performed on 500x200x45 mm (x,y,z) steel sheets withmilled joint edges. Using LAHW and selected materials, largeamounts of acicular ferrite was formed in the upper half of thejoint, gradually having increasingly more bainitic structurescloser to the weld root. 

From these results, it is concluded thatLAHW has high potential for increased production efficiencyand lowered costs, potentially replacing arc welding for thesetypes of applications.

Place, publisher, year, edition, pages
2018.
National Category
Manufacturing, Surface and Joining Technology
Research subject
Manufacturing Systems Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-75539OAI: oai:DiVA.org:ltu-75539DiVA, id: diva2:1343147
Conference
71st IIW International Conference
Available from: 2019-08-15 Created: 2019-08-15 Last updated: 2019-08-27

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CiteExportLink to record
Permanent link

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Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
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Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf