Single-pass Hybrid Laser Welding of 25 mm Thick Steel

Farrokhi, Farhang; Larsen, Raino Mikael; Kristiansen, Morten

doi:10.1016/j.phpro.2017.08.019

Cited by 17 publications

(9 citation statements)

References 11 publications

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“…A kind of hybrid technique consists on applying One Sided Single Pass welding (OS_SP), where one side of the plates are jointed with only one welding pass. Farrokhi et al [80] welded 25 mm thick S355J2 steel with a tulip-shaped groove in a single pass using disk laser GMAW hybrid system with full penetration features (Table 11C). However, the laser cutting process applied to generate the groove was not completely reproducible and some experiments displayed partial penetration and cracks.…”

Section: Macrostructurementioning

confidence: 99%

“…In some cases, the one sided single pass hybrid laser arc welding may be not enough to fill the gap between the workpieces or promote full weld penetration and additional arc passes are required after the hybrid root joint. In the same study cited above, Farrokhi et al [80] used this one sided multi passes technique (OS_MP), applying two arc passes to achieve a full penetration (Table 11D). As an interesting result, the continuous solidification crack observed after the hybrid pass disappeared after the second arc pass, indicating that the crack could be re-melted and healed during the second process.…”

Section: Macrostructurementioning

confidence: 99%

“…Some studies reported the microstructural evolution of a complete penetration joint. Farrokhi et al [80] investigated the case of single pass welding applied to 25 mm thick S355J2 steel using filler wire ESAB OK 12.50 and disk laser GMAW process (Table 11C,D). The microstructure of the laser zone was composed by bainite with columns bending towards the centre of the weld (Figure 13a).…”

Section: Microstructurementioning

confidence: 99%

“…Microstructure of (a) the laser zone, (b) centre line after single pass and (c) centre line after second pass (reproduced from[80] with permission, Elsevier, 2017).…”

mentioning

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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Section: Macrostructurementioning

confidence: 99%

Section: Macrostructurementioning

confidence: 99%

Section: Microstructurementioning

confidence: 99%

“…Microstructure of (a) the laser zone, (b) centre line after single pass and (c) centre line after second pass (reproduced from[80] with permission, Elsevier, 2017).…”

mentioning

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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“…Consequently, several innovations appear in this welding process that contributes for its improvement [2]. One of the improvements is automated hybrid laser arc welding, whereby combining the advantages of two different processes, Laser Beam Welding -LBW and semiautomatic welding processes such as Gas Metal Arc Welding -GMAW and Flux-Cored Arc Welding -FCAW represents an excellent substitute for conventional welding processes [17].…”

Section: Introductionmentioning

confidence: 99%

Impact analysis of the hybrid laser arc welding parameters of structural steels: State of the art

Petreski,

Runchev,

Vrtanoski

2023

Zavariv zavar konstrukcije

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The effectiveness of the hybrid laser arc welding is based on the combination of two heat sources in a single welding process, resulting in welding process that is characterized with higher welding speed, increased productivity, deeper penetration, stable process, better gap bridging ability, less heat input to the welding material and high flexibility. The physical complexity of the process is a main disadvantage, i.e. an increased number of parameters that need to be synchronized and optimized in order to obtain a perfect weld. In this paper, based on the previous experimental research, a complete analysis of the primary hybrid laser arc welding parameters was performed, and general conclusions were drawn regarding their impact on the welding process stability, the weld shape and its mechanical characteristics. The introduction part contains a general analysis of previous research. In the second part, characteristics of the performed hybrid welds in structural steels and detailed analysis are presented. In the final part, general conclusions are made regarding the influence of the primary hybrid laser arc welding parameters on the structural steel.

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