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Differences between arc models in laser hybrid arc welding upon weld bead stability and undercut formation
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Product and Production Development.ORCID iD: 0000-0003-4265-1541
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Product and Production Development.ORCID iD: 0000-0002-3569-6795
2013 (English)In: 14th NOLAMP Conference: The 14th Nordic Laser Materials Processing Conference, August 26th – 28th 2013, Gothenburg, Sweden / [ed] Alexander Kaplan; Hans Engström, Luleå: Luleå tekniska universitet, 2013, 205-216 p.Conference paper, Published paper (Other academic)
Abstract [en]

In this study, three different arc modes are studied in laser hybrid arc welding with a gasmetal arc, i.e. Standard, Pulsed and Cold Metal Transfer mode. Originally developed forbeing able to weld thin materials, the pulsed mode is the favoured arc mode in both ordinaryarc welding and hybrid welding. The pulsed mode is a more controlled gas metal arc weldingprocess that uses less heat and is able to weld thinner materials than the spray mode processwith globular drop transfer. The cold metal transfer mode utilizes surface tension droptransfer, compared to the free flying drops governing the other modes and is thus even morecontrolled than the pulsed mode. The cold metal transfer mode is much colder than the otherarc modes and is considered to generate less undercuts and spatter than the other modes, byboth developers and users alike.This study compares welds made by the three arc modes for both low and highdeposition rates. The welds are studied by macrographs, scanning and high speed imaging.This study shows that the differences between drop transfer modes are partially eliminateddue to the presence of a laser keyhole. The main arguments to use either arc mode arediscussed.

Place, publisher, year, edition, pages
Luleå: Luleå tekniska universitet, 2013. 205-216 p.
National Category
Manufacturing, Surface and Joining Technology
Research subject
Manufacturing Systems Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-30156Local ID: 3e4d5787-f70b-4916-9b31-93535dc7dc5dISBN: 978-91-7439-688-1 (print)ISBN: 978-91-7439-689-8 (electronic)OAI: oai:DiVA.org:ltu-30156DiVA: diva2:1003383
Conference
Nordic Laser Materials Processing Conference : 26/08/2013 - 28/08/2013
Note
Godkänd; 2013; 20131210 (andbra)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved

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Frostevarg, JanKaplan, Alexander

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