Hybrid Laser-Arc Welding of the High-Strength Shipbuilding Steels: Equipment and Technology

Turichin, Gleb; Кузнецов, М. В.; Tsibulskiy, I.A.; Firsova, Anna V.

doi:10.1016/j.phpro.2017.08.005

Cited by 46 publications

(15 citation statements)

References 8 publications

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“…Similarly, a quality level B according to ISO 12932 [33] in the evaluation of internal and external defects was obtained by Tsibulskiy [25] on one side HLAW T-joints with 12.5 mm thickness welded on the flat position 1F. The experimental tests reported in [4] allowed authors to obtain weld seams on 14 mm T-joints from steel E36 using 14.5 kW laser power. Unfortunately, authors did not provide key experimental parameters to reproduce the welds, such as welding position, head angles, or edge preparation.…”

Section: Evaluation Of Imperfectionsmentioning

confidence: 99%

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The Effects of HLAW Parameters for One Side T-Joints in 15 mm Thickness Naval Steel

Churiaque

Sánchez-Amaya

Porrúa-Lara³

et al. 2021

Metals

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The present contribution is the first research reporting full penetration HLAW joints in 15 mm thick EH36 steel butt T-welds with square grooves on 2F welding position by single-sided welding. The effects of welding parameters were investigated to increase the quality of the joints. Conditions leading to defect-free full penetration welds fulfilling naval regulations includes a laser power of 12.5 kW, a welding speed of 1.6 m/min and the vertical laser offset distance from the flange of 1 mm. Advanced characterization of selected welds included a microstructural identification by optical microscopy, SEM, and XRD, revealing the presence of acicular, polygonal and Widmanstätten ferrite, lath martensite, and some retained austenite at FZ. Hardness and microhardness mapping tests showed values of 155 HV at base metal and 200 to 380 HV at the fusion zone connecting the web to the flange.

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Section: Evaluation Of Imperfectionsmentioning

confidence: 99%

“…Hybrid Laser Arc Welding (HLAW) is an attractive joining method used as a single pass welding technique covering a wide range of thicknesses, with plates of up to 35 mm [1][2][3][4]. It provides good quality joints, minimal thermal distortions and improved productivity in comparison with conventional arc welding.…”

Section: Introductionmentioning

confidence: 99%

The Effects of HLAW Parameters for One Side T-Joints in 15 mm Thickness Naval Steel

Churiaque

Sánchez-Amaya

Porrúa-Lara³

et al. 2021

Metals

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“…"Kvaerner Warnow Werft" (Rostock, Germany) company is equipped with a portal LAHW system with a fibre/disc laser. Fincantieri Shipyards (Monfalcone, Italy) and STX Finland Cruise Oy (Turku, Finland), are also equipped with laser and LAHW technologies for shipbuilding [47].…”

Section: Lahw In Shipbuildingmentioning

confidence: 99%

“…Some studies with European funding have begun to examine the particular quality control and methods of non-destructive testing of laser welding in the shipbuilding industry [50][51][52]. Table 8 shows a condensed values range of the laser parameters used in several experimental works of LAHW process, in order to have an approximation regarding the welding parameters already applied in literature [47,49,56,57,60,61,[71][72][73]. The table reports welds involving thick plates of structural steel with an upper yield strength of 355 MPa and thickness between 20 and 45 mm.…”

Section: Gradementioning

confidence: 99%

“…Concerning the arc and laser relative position at the LAHW head, different possibilities have been analysed, as arc leading position (arc before laser) or laser leading (laser before arc). Specifically, in Reference [47,56,57,61,71] arc leading position is used; by contrast, Kristensen applied laser leading in Reference [72]; and both configurations (arc leading and laser leading) have been experimented in Reference [49,60,73].…”

Section: Arc Parametersmentioning

confidence: 99%

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Laser Hybrid Butt Welding of Large Thickness Naval Steel

Churiaque

Chludzinski

Porrúa-Lara³

et al. 2019

Metals

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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.

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Influencing of Molten Pool Dynamic Behavior on the Weld Formation during the Laser‐Arc Hybrid Welding of 12 mm Thick Steel

Li,

Xu,

Liu

et al. 2024

steel research int.

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A numerical simulation model is put forward to study the molten pool dynamic behavior and clarify its influencing mechanism on the undercut defects in laser‐arc hybrid welding (LAHW). The undercut defect is a common and challenging problem to address. However, a controversy exists on whether the dynamic process of molten pool can affect undercut defects, and the potential mechanism has been still unclear. The results suggest that profile variation of molten pool surface is driven by surface tension gradient, and the existence of eddy can alter the morphology and surface tension distribution of molten pool, which is the main factor to homogenize the flow field. Compared with the short‐circuit transfer mode, the molten metal flows toward the welds edge at a constant velocity (2.5–3.75 m min−1) in the spray transfer mode, which improves the stability of molten pool flow. It can be observed that the irregular fluctuation of molten metal during the solidification process can directly cause the undercut defects.

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Hybrid Laser-Arc Welding of the High-Strength Shipbuilding Steels: Equipment and Technology

Cited by 46 publications

References 8 publications

The Effects of HLAW Parameters for One Side T-Joints in 15 mm Thickness Naval Steel

The Effects of HLAW Parameters for One Side T-Joints in 15 mm Thickness Naval Steel

Laser Hybrid Butt Welding of Large Thickness Naval Steel

Influencing of Molten Pool Dynamic Behavior on the Weld Formation during the Laser‐Arc Hybrid Welding of 12 mm Thick Steel

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