Welding Thick Steel Plates with Fibre Lasers and GMAW

Vollertsen, Frank; Grünenwald, Stefan; Rethmeier, Michael; Gumenyuk, Andrey; Reisgen, Uwe; Olschok, Simon

doi:10.1007/bf03263489

Cited by 53 publications

(14 citation statements)

References 4 publications

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“…Wall-plug efficiency of arc welding machines (MMAW, GMAW and the arc content of LAHW) was set to 80% according to latest measurements of Haelsig who used similar equipment (Haelsig, 2014). Energy efficiency of the laser beam source was set to 30% and was taken from literature and manufacturer information (IPG Phtotonics, 2014;Vollertsen et al, 2010). Chemical compositions of consumed materials were taken from available product data sheets.…”

Section: Life Cycle Assessmentmentioning

confidence: 99%

Life Cycle Assessment of welding technologies for thick metal plate welds

Sproesser

Chang

Pittner

et al. 2015

Journal of Cleaner Production

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Section: Life Cycle Assessmentmentioning

confidence: 99%

Life Cycle Assessment of welding technologies for thick metal plate welds

Sproesser

Chang

Pittner

et al. 2015

Journal of Cleaner Production

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“…In B w , significant savings in welding material and electricity consumption are achieved. as well as additional consumption for the cooling unit (Haelsig, 2014;IPG Phtotonics, 2015;Vollertsen et al, 2010). Electricity consumption of TGMAW and multi-wire SAW is calculated by the respective voltages and currents and the wall-plug efficiency of 80%.…”

Section: Longitudinal Welding Of Large-diameter Steel Pipesmentioning

confidence: 99%

Assessing carbon dioxide emission reduction potentials of improved manufacturing processes using multiregional input output frameworks

Ward

Burger

Chang

et al. 2017

Journal of Cleaner Production

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a b s t r a c tEvaluating innovative process technologies has become highly important within the last decades. As standard tools different Life Cycle Assessment methods have been established, which are continuously improved. While those are designed for evaluating single processes they run into difficulties when it comes to assessing environmental impacts of process innovations at macroeconomic level. In this paper we develop a multi-step evaluation framework building on multi regional inputeoutput data that allows estimating macroeconomic impacts of new process technologies, considering the network characteristics of the global economy.Our procedure is as follows: i) we measure differences in material usage of process alternatives, ii) we identify where the standard processes are located within economic networks and virtually replace those by innovative process technologies, iii) we account for changes within economic systems and evaluate impacts on emissions.Within this paper we exemplarily apply the methodology to two recently developed innovative technologies: longitudinal large diameter steel pipe welding and turning of high-temperature resistant materials. While we find the macroeconomic impacts of very specific process innovations to be small, its conclusions can significantly differ from traditional process based approaches. Furthermore, information gained from the methodology provides relevant additional insights for decision makers extending the picture gained from traditional process life cycle assessment.

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“…The combination of laser beam and GMA welding process to a common hybrid process shifts the limit of the required tolerances so that also defined joining gaps can be welded [5,6]. Various studies have shown that the joining of steel plates with a plate thickness of up to 20 mm [7] and even 25 mm [8] can be achieved in only one layer. However, pores prove to be problematic.…”

Section: Introduction/motivationmentioning

confidence: 99%

Visualization of the molten pool of the laser beam submerged arc hybrid welding process

2020

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Submerged arc welding is currently the predominant industrial welding process for joining various steel grades in the plate thickness range of about 40 mm. A high energy input and the associated component distortion are unavoidable due to the high number of welding layers. By combining the conventional submerged arc welding process with the laser beam welding process to form a common hybrid welding process, this welding task can be mastered in only two welding layers by means of layer-counterlayer technology. This considerably reduces the welding time and thermally induced component distortion to a minimum due to the symmetrical energy input. A characteristic feature of a hybrid welding process is the formation of a common weld pool. In previous studies, the mixing of the molten pool has already been proven using chemical analysis methods. In the context of this paper, the shaping of the hybrid weld pool is also discussed. The molten material is expelled out of the joining zone by means of a gas pressure surge. Subsequently, a light section sensor was used to scan this area and produce a three-dimensional image from the formerly molten weld seam area. This shows that a single contiguous melt pool is produced. Finally, the first one-sided welds with full penetration and backing will be presented and discussed.

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Welding Thick Steel Plates with Fibre Lasers and GMAW

Cited by 53 publications

References 4 publications

Life Cycle Assessment of welding technologies for thick metal plate welds

Life Cycle Assessment of welding technologies for thick metal plate welds

Assessing carbon dioxide emission reduction potentials of improved manufacturing processes using multiregional input output frameworks

Visualization of the molten pool of the laser beam submerged arc hybrid welding process

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