Bead characterization on FCAW welding of a basic tubular wire

Starling, Cícero Murta Diniz; Modenesi, Paulo José; Borba, Tadeu Messias Donizete

doi:10.1080/09507110902844576

Cited by 3 publications

(3 citation statements)

References 2 publications

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“…Welding parameters must be optimized in order to obtain a good weld joint with the required bead geometry and weld quality [20]. There are also several publications about optimizations of the FCAW process by weld bead geometry analysis [21][22][23][24][25][26][27][28][29][30][31][32][33][34][35]. In these studies especially the effects of FCAW welding current, welding speed, arc voltage, electrod angle and nozzle to plate distance were investigated.…”

Section: Introductionmentioning

confidence: 99%

Effects of Welding Current and Arc Voltage on Fcaw Weld Bead Geometry

Kurtulmuş¹

2015

IJRET

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Flux cored arc welding(FCAW) process is characterized with its high deposition rate and productivity. Control of the operating parameters in FCAW is essential to obtain high production rates and good quality welds. Bead on plate welds were carried out on mild steel plates to study the influence of welding current and arc voltage on weld bead geometry parameters. The weld bead coss-sections were metallographically investigated. The effects of these welding parameters were evaluated by measuring penetration depth, reinforcement height, bead width, wetting angle, electrod deposit area and plate fusion area. The bead crosssection area and the weld shape factor were calculated from the measured results. The effects of welding parameters on weld bead geometry have been presented by histograms.

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Section: Introductionmentioning

confidence: 99%

Effects of Welding Current and Arc Voltage on Fcaw Weld Bead Geometry

Kurtulmuş¹

2015

IJRET

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“…Em estudos anteriores, os autores do presente trabalho avaliaram os efeitos da velocidade de alimentação do arame, do gás de proteção e da polaridade do eletrodo nas características do cordão produzido por arames tubulares nacionais dos tipos básico (ASME SFA-5.20: E71T-5/E71T-5M) [16], rutílico (ASME SFA-5.20: E71T-1/E71T-9/ E71T-9M) [17] e "metal cored" (ASME SFA-5.18: E70C-3M) [18]. Os autores também realizaram um estudo comparativo das características operacionais do processo e do cordão resultantes dos mesmos tipos de arames tubulares na soldagem com polaridade positiva, controlando-se a velocidade de alimentação do arame e o tipo de gás de proteção [19] e, no presente trabalho, será realizado um estado comparativo similar na soldagem com polaridade negativa.…”

Section: Introductionunclassified

Comparação do desempenho operacional e das características do cordão na soldagem com diferentes arames tubulares em polaridade negativa

2011

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* Autor para quem toda a correspondência deve ser encaminhada Resumo Este trabalho objetivou o estudo comparativo das características do cordão produzido por arames tubulares nacionais dos tipos rutílico , básico (ASME e "metal cored" (ASME , basic (ASME and metal cored (ASME . Welding trials were performed in downhand position on thick (12 mm) low-carbon steel plates using a constant voltage power supply in negative wire polarity (CC-). Welding current and voltage, and wire feed rate were monitored in all trials. For each tubular wire type, the shielding gas composition (75%Ar-25%CO 2 and 100%CO 2 ) and wire feed rate (7 and 9 m/min) were changed, and other process variables, including electrode and arc lengths (16 mm and 3.5 mm, respectively)

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“…The mean values of the two samples of each bead are listed in Table 6. When welding was carried out keeping the contact tip dry, the bead width increased as the parameters Voltage, CTWD and Wire Speed increased, according to values listed on literature to FCAW performed in open air [15][16][17][18]. Figure 9 shows the macrographs of beads obtained in runs 3, 4, 7 and 8, in both configurations, contact tip dry and in water.…”

Section: Macrographic Analysismentioning

confidence: 99%

Evaluation of the Effect of the Water in the Contact Tip on Arc Stability and Weld Bead Geometry in Underwater Wet FCAW

Assunção

Bracarense

2017

Soldag. insp.

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Underwater wet flux cored arc welding -FCAW -is an important process employed to repair marine structures with the advantages of not handling the components off the water and offers higher productivity in comparison to other conventional welding process. Under the water, wet welding activities are performed with lower stability, due to the pressure of the water surrounding the arc column and the presence of water in the gap between the contact tip and the electrode, which promotes poor electrical contact. In the present work, to compare the process stability of underwater wet FCAW with self-shielded electrode, welds were carried out using a special torch, which keeps the contact tip dry under the water. A two-level factorial design was used for experimentation and an Analysis of Variance was conducted to validate the results. Current coefficient of variation was used as the stability index. Welds performed with the torch have shown better-shaped beads and more stable arc in comparison to beads deposited with no mechanical barrier between water and the contact tip.

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Bead characterization on FCAW welding of a basic tubular wire

Cited by 3 publications

References 2 publications

Effects of Welding Current and Arc Voltage on Fcaw Weld Bead Geometry

Effects of Welding Current and Arc Voltage on Fcaw Weld Bead Geometry

Comparação do desempenho operacional e das características do cordão na soldagem com diferentes arames tubulares em polaridade negativa

Evaluation of the Effect of the Water in the Contact Tip on Arc Stability and Weld Bead Geometry in Underwater Wet FCAW

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