Laser Hybrid Butt Welding of Large Thickness Naval Steel

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2019-01Department
Ciencia de los Materiales e Ingeniería Metalúrgica y Química InorgánicaSource
Metals 2019, 9, 100;Abstract
Plates joining is one of the first stage at large vessels manufacturing line, process
conditioning the whole shipbuilding production. Laser Arc Hybrid Welding (LAHW) process
is nowadays providing promising results for large thickness naval steel, being primarily used for
welding plates with thicknesses between 6 to 15 mm, reaching up to 51 mm. In addition to this
high penetration ability, LAHW allows increasing the production rates. Therefore, this technology
is proposed as an alternative to conventional welding processes in shipbuilding, as it integrates
the advantages of laser and arc welding, providing high process stability, high welding speed and
penetration, narrow weld beads with a low heat input and good metallurgical properties. The present
review reports the most representative investigation regarding the use of this technology to join
large thickness flat panels of naval steel. It includes a summary of the most influential process
variables, equipment characteristics, material properties, naval regulations, as well as microstructural
characterisation and mechanical properties of joints. This review is thought to help readers from
different backgrounds, covering from non-expert on welding or on naval sector, to industrial LAHW
applicators and researchers. The industrial need of performing one single pass procedure to assure
high quality welds of high thickness is suggested as one of the key aspects for future investigations.
Subjects
laser hybrid welding; arc welding; laser welding; thick plate; naval steel; shipbuildingCollections
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