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Deep penetration fiber laser-arc hybrid welding of thick HSLA steel
Norwegian University of Science and Technology, Department of Industrial and Mechanical Engineering.
Norwegian University of Science and Technology, Department of Engineering Design and Materials.
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Produkt- och produktionsutveckling.ORCID-id: 0000-0003-4265-1541
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Produkt- och produktionsutveckling.ORCID-id: 0000-0002-3569-6795
2018 (engelsk)Inngår i: Journal of Materials Processing Technology, ISSN 0924-0136, E-ISSN 1873-4774, Vol. 256, s. 216-228Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The present investigation addresses laser-arc hybrid welding of 45 mm thick steel with variation in a wide range of process parameters. High volume fraction of acicular ferrite formed in the upper part of the weld metal regardless process parameters. Significantly lower fraction of acicular ferrite was found in the root due to substantially increased cooling rates and the inability to deliver filler wire to this region, resulting in bainite-martensite microstructures in the root. The delivery of filler wire to the root can be enhanced by increasing the air gap between the plates. Higher heat inputs reduce cooling rates in the root which create softer and ductile microstructures, at the expense of a much wider and coarser grained HAZ. The results obtained showed high fusion line and weld metal toughness at low temperature (−50 °C).

sted, utgiver, år, opplag, sider
Elsevier, 2018. Vol. 256, s. 216-228
HSV kategori
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Produktionsutveckling
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URN: urn:nbn:se:ltu:diva-67696DOI: 10.1016/j.jmatprotec.2018.02.026ISI: 000431156800021Scopus ID: 2-s2.0-85042446378OAI: oai:DiVA.org:ltu-67696DiVA, id: diva2:1183964
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Validerad;2018;Nivå 2;2018-02-26 (andbra)

Tilgjengelig fra: 2018-02-20 Laget: 2018-02-20 Sist oppdatert: 2018-06-11bibliografisk kontrollert

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