A first assessment of laser hybrid welding of 420 mpa steel for offshore structure application
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, 171-182 p.Conference paper (Other academic)
For many years, laser hybrid welding has been used in various industries to increaseproductivity and reduce costs. One example is the adaption of the hybrid process inshipbuilding. The next natural step is to further develop the process for the oil and gasindustry, where the welded joint properties requirements are more severe, and the ability tohandle tolerance deviations is more critical. As a first attempt to develop hybrid laser processfor the use in offshore structures, the present investigation addresses preliminary weldingtrails carried out with 15 kW fibre laser with appropriate gas metal arc welding equipment,using double Y joint geometry and 20 mm thick 420 MPa steel plates. The subsequent weldtesting included both Charpy V notch impact and CTOD fracture mechanical testing at -30°C.The results indicate that the heat affected zone (HAZ) of the examined steel appeared withsatisfactory Charpy and CTOD toughness (> 200 J, > 0.2 mm) while the weld metal hadinsufficient toughness (20-40 J, < 0.2 mm). With a better welding wire, designed for lowtemperature applications, it is reasonable to suggest that laser hybrid arc welding can be usedfor applications even below a temperature of -30°C.
Place, publisher, year, edition, pages
Luleå: Luleå tekniska universitet, 2013. 171-182 p.
Research subject Manufacturing Systems Engineering
IdentifiersURN: urn:nbn:se:ltu:diva-38823Local ID: d552e814-e923-451f-9cd7-50f5686d9f5fISBN: 978-91-7439-688-1ISBN: 978-91-7439-689-8 (PDF)OAI: oai:DiVA.org:ltu-38823DiVA: diva2:1012324
Nordic Laser Materials Processing Conference : 26/08/2013 - 28/08/2013
Godkänd; 2013; 20131210 (andbra)2016-10-032016-10-03Bibliographically approved