Metal transfer in submerged arc welding

Li, Ke; Wu, Zhaohui; Zhu, Yanjun; Liu, Cuirong

doi:10.1016/j.jmatprotec.2017.02.004

Cited by 20 publications

(7 citation statements)

References 4 publications

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“…As a result of this series of slag behaviors, the preformed cavity was filled by the slag at the backward of the heat source. [3] From the direct observation results, it was made clear that there were bluish white plasma beneath a molten metal droplet and orange emitting region around the plasma. [4] Although the positional relationship between arc plasma and molten metal droplet was similar to a globular transfer, molten metal droplet whose diameter was smaller than the wire diameter was detached from the tip of the wire.…”

Section: Discussionmentioning

confidence: 99%

“…As a result, they successfully observed the molten metal droplet transfer phenomena inside of a space which was called cavity and formed by the evaporation of fluxes. Moreover, Li et al 3) also directly observed SAW phenomena. In their study, molten metal droplet transfer phenomena were observed with a laser as a light source when a wire was traversed in a tunnel which was set in a direction perpendicular to the weld line.…”

Section: Introductionmentioning

confidence: 96%

See 1 more Smart Citation

Visualization of Submerged Arc Welding Phenomena by X-ray Observation and Direct Observation

Komen

Abe

Fujimoto

et al. 2018

QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY

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Behaviors of flux, slag and molten metal during a submerged arc welding with a large current were observed by the X-ray observation system including a high speed video camera. Moreover, the direct observation using a high speed video camera was also carried out to observe the arc phenomena, which could not be observed by the X-ray observation. From X-ray observation results, the weld part during a submerged arc welding was classified broadly into 4 regions. Then, it was clarified that a slag was pushed backward in a welding direction when it approached to a wire which an arc plasma existed around. As a result of this series of slag behaviors, the preformed cavity was filled by the slag at the backward of the heat source. In addition, from a direct observation, it was made clear that there were bluish white plasma at beneath a molten metal droplet and orange emitting region around the plasma.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

Visualization of Submerged Arc Welding Phenomena by X-ray Observation and Direct Observation

Komen

Abe

Fujimoto

et al. 2018

QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY

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“…Compared to the electrodes for electric arc welding, the repair technology of worn-out surfaces by weld deposition does not provide for restrictions on the carbon and alloying elements concentration for the electrode wire. In general, rather difficult conditions for stabilisation of arc combustion [2][3][4] can be reduced to two main processes: changing the state of metal aggregation and transferring it to the weld pool [5][6][7][8][9]. When the first portions of liquid metal appear, a static pressure gradient directed towards the electrode axis, which is caused by the pinch effect, arises at the end of the electrode.…”

Section: Introductionmentioning

confidence: 99%

Influence of Plastic Deformation Carbon Steel on the Process of Burning Electric Arc

Vakulenko¹,

Plitchenko²,

Kurt³

et al. 2021

SJSUT.ST

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During a study of the combustion process of a direct polarity electric arc, a directly proportional dependence of the electric current value on the degree of cold plastic deformation of carbon steel used as an electrode was found. To calculate the value of the electric current during arc burning, in the indicated ratio, it was proposed to replace the surface tension force of the liquid metal with the surface tension of ferrite of plastically deformed carbon steel. Calculation of the ferrite’s surface tension value on the deformation degree of the steel under study through the size of the coherent scattering regions was used to explain the observed dependence of the electric current during arc burning. From the analysis of the considered correlation ratios, it was found that with an increase in the cold deformation degree, the refinement of the coherent scattering regions results in the ferrite’s surface tension increase and consequently, to an increase in the electric current during arc burning. Comparative analysis of the obtained results of calculating the value of electric current during arc burning through the surface tension of ferrite of cold-deformed carbon steel showed a fairly good coincidence with experimental data. The differences did not exceed 9%.

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“…Many studies are prepared about submerged arc welding processes and welding fluxes. These investigations mainly covers the subjects about current effects, optimizing the welding parameters, analysis of welding aspects, dilution in weld zones, chemical and thermo-physical properties of weld metals and heat affected zones (HAZ), prediction of weld regions behavior properties, the effects of inclusions and alloying elements on weld zones [3][4][5][6][7][8][9][10][11][12][13][14]. But this study especially focuses on the effects of flux types on micro-structural and mechanical developments of S235 steel alloys joined by submerged arc welding.…”

Section: Introductionmentioning

confidence: 99%

S235 Yapı Çeliğinin Tozaltı Kaynağında Toz Türünün Mekanik ve Mikroyapısal Özelliklere Etkileri

Başyiğit¹,

Solak²

2020

El-Cezeri Fen Ve Mühendislik Dergisi

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S235 fine grained steel alloys are demanded especially in structural components of buildings, factories and mechanical parts of machines where yield strength values close to minimum 235 mega-pascals (MPa) are in concern. These steels are classified in low alloyed steel groups and in consequence of the cheapness of these alloys their consumption is increasing as well. In this work; 15 mm of S235 structural steel plates are submerged arc welded by 2 types of welding fluxes. The first welding flux is selected as SA AB 1 68 AC H5 as basic character with the basicity index of 1.4 while the second flux is SA AR 1 77 AC rutile as low basic character with the basicity index of 0.7 according to TS EN ISO 14174 by both using the same welding wire S2 of 4mm in diameter according to TS EN ISO 14171-A standard. The effects of flux composition on microstructural and mechanical properties of welded S235 steel alloy are examined. Micro-vickers hardness surveys of base metal and heat affected zones with weld metals, transverse tensile tests and micro-structural investigations are applied for comparison of these two types of welding fluxes. The samples joined by basic and rutile flux are both qualified in micro-vickers hardness surveys and transverse tensile tests. Rutile flux transformed the ferriticpearlitic microstructure into needle like view while basic flux maintained it more globular. Whether globular microstructure is desired in case of toughness considerations in industrial applications, basic flux should be preferred.

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Metal transfer in submerged arc welding

Cited by 20 publications

References 4 publications

Visualization of Submerged Arc Welding Phenomena by X-ray Observation and Direct Observation

Visualization of Submerged Arc Welding Phenomena by X-ray Observation and Direct Observation

Influence of Plastic Deformation Carbon Steel on the Process of Burning Electric Arc

S235 Yapı Çeliğinin Tozaltı Kaynağında Toz Türünün Mekanik ve Mikroyapısal Özelliklere Etkileri

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