Methods of controlling melting and transfer of electrode metal (review)

Krampit, N.Yu.

doi:10.1080/09507116.2010.486194

Cited by 3 publications

(3 citation statements)

References 1 publication

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“…The key to reaching the objective of the paper is the use of rational intervals of cooling rates of the HAZ metal during welding of low-alloy pipe steels [2,3] and modification of the calculated dependences from the existing works [4][5][6][7][8].…”

Section: Research Materials and Methodsmentioning

confidence: 99%

Effect of the Weld Deposit Thickness on the Impact Strength of Heat-Affected Zone of the Welded Joint

Antonov¹,

Kornilova²,

Ammosov³

et al. 2023

MSF

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The methodology has been developed to show the functional connection of the impact strength of the heat-affected zone metal of welded joints with weld deposit thickness and, accordingly, with the consumption of welding materials during electric arc welding while constructing and repairing various metal structures and pipeline systems operating in conditions of low climatic temperatures. To reach the objective of the paper, rational intervals of cooling rates of the HAZ metal during welding low-alloy pipe steels were used, and the calculated dependences from the existing works were modified. The methodology allows increasing cold resistance of welded joints of steels of mass use by regulating the weld deposit thickness and welding consumables during electric arc welding while constructing and repairing various metal structures and pipeline systems operating in extreme conditions of the North.

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Section: Research Materials and Methodsmentioning

confidence: 99%

Effect of the Weld Deposit Thickness on the Impact Strength of Heat-Affected Zone of the Welded Joint

Antonov¹,

Kornilova²,

Ammosov³

et al. 2023

MSF

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“…However, this process has a number of disadvantages, the main of which are the following: large penetration depth of base metal; high losses of electrode metal for spattering (from 5 to 15 %); narrow range of surfacing modes with producing a satisfactory bead formation etc. [1,2].The studies, aimed at eliminating disadvantages and improving this technological process, are the subject of numerous works, from which it follows that conditions for formation of deposited metal and manufacturability of arc surfacing in CO 2 are determined to a large extent by the possibility of implementation of controllable transfer of molten electrode metal to the weld pool [3,4].The effect on electrode metal transfer at constant rate of electrode wire feeding and pulse control of electric parameters of welding arc was realized by such producers like EWM, OTC Daihen, Kemppi, Cloos, ESAB and a number of others. Fronius realized a combined electric mechanical control [5][6][7][8][9][10].…”

mentioning

confidence: 99%

“…The studies, aimed at eliminating disadvantages and improving this technological process, are the subject of numerous works, from which it follows that conditions for formation of deposited metal and manufacturability of arc surfacing in CO 2 are determined to a large extent by the possibility of implementation of controllable transfer of molten electrode metal to the weld pool [3,4].…”

mentioning

confidence: 99%

Effect of pulsed electrode wire feeding on formation and wear resistance of deposited bead and losses of electrode metal in CO<sub></sub>2 arc surfacing

Lendel¹,

Maksimov²,

Лебедев³

et al. 2015

The Paton Welding J.

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The work deals with the results of investigations of influence of pulsed electrode wire feed parameters on the conditions of deposited metal bead formation, wear resistance and losses of electrode metal in electric arc surfacing in CO2. The comparative analysis of results was carried out obtained at constant and pulsed electrode wire feed. It was shown that change in electrode wire feed rate at constant power parameters of surfacing process allows efficiently influencing the formation of deposited bead, wear resistance and amount of losses of electrode metal. The given result is achieved due to change of kinematical conditions of electrode metal transfer from the electrode end through the arc gap to the molten metal pool. The most important field of the modern welding science and technology is surfacing. The methods of arc surfacing acquired a dominated position in industrial practice. One of the widespread methods remains surfacing in pure CO 2 . However, this process has a number of disadvantages, the main of which are the following: large penetration depth of base metal; high losses of electrode metal for spattering (from 5 to 15 %); narrow range of surfacing modes with producing a satisfactory bead formation etc. [1,2].The studies, aimed at eliminating disadvantages and improving this technological process, are the subject of numerous works, from which it follows that conditions for formation of deposited metal and manufacturability of arc surfacing in CO 2 are determined to a large extent by the possibility of implementation of controllable transfer of molten electrode metal to the weld pool [3,4].The effect on electrode metal transfer at constant rate of electrode wire feeding and pulse control of electric parameters of welding arc was realized by such producers like EWM, OTC Daihen, Kemppi, Cloos, ESAB and a number of others. Fronius realized a combined electric mechanical control [5][6][7][8][9][10].A very scarce information is available in literature on the possibilities of control of molten electrode metal transfer only due to the change in electrode wire feed rate using control circuits of electric parameters of serial sources of welding current.For these investigations a unique mechanism of pulsed electrode wire feed was designed at the E.O. Paton Electric Welding Institute (Figure 1) which allows controlling the electrode metal transfer without using the feedback with welding current source.The investigations of effect of the pulsed electrode wire feed on geometric sizes of deposited bead were carried out for characteristic ranges of parameters of surfacing in CO 2 , at which a satisfactory formation of surface of the deposited metal is preserved: surfacing current varied in the range of 80-400 A and arc voltage was 14-38 V, surfacing speed was 7 mm/s, electrode stickout was 12 mm, consumption of shielding gas was 0.3 l/s, diameter of nozzle was 20 mm. Power sources Kemppi FastMIG KMS-500 and VDU-506 were applied. The base metal was steel St3. Electrode wires Sv-08G2S and Np-30KhGSA of 1.2 mm diamet...

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A Study of the Influence of Additives of Nanostructured Functional Ceramics in the Coating of Welding Electrodes on their Welding and Technological Properties

Saidov,

Rakhimov,

Touileb

et al. 2024

Eng. Technol. Appl. Sci. Res.

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The present work aims to study the influence of Nanostructured Functional Ceramics Photocatalysts (PNFC) under the brand name ZB-2, obtained using a synthesis method deploying pulsed radiation activation technology on welding and technological properties. This method of obtaining ceramic material allows the latter to be produced on an industrial scale. Therefore, it can replace the technology for producing PNFC under the influence of concentrated solar radiation at the Big Solar Furnace (BSF) of the Institute of Materials Science, Academy of Sciences of the Republic of Uzbekistan. The ZB-2 ceramic material has shown its effectiveness when used as an additive in the coating charge of the MR-3 welding electrode. Thus, the breaking arc length of the MR-3 welding electrode is increased up to 2% with the addition of ZB-2 to the coating charge. With additions of more than 2%, the breaking arc length decreases. The additive ZB-2 has the same effect on the diameter of the deposited point of the MP-3 welding electrode. When its content in the coating is up to 2%, the diameter of the deposited point increases, and a further increase in the additive content reduces this indicator. Adding up to 1% ZB-2 into the coating composition has a beneficial effect on the size of the peak at the end of the electrode. When its content exceeds 1%, the latter decreases. Also, an increase in the content of the PNFC additive in the coating of the MR-3 electrode reduces the value of the melting coefficient and increases the value of the deposition coefficient, which contributes to a sharp reduction in losses due to waste and spattering up to 53% when the additive content in the coating mass is up to 8%.

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Methods of controlling melting and transfer of electrode metal (review)

Cited by 3 publications

References 1 publication

Effect of the Weld Deposit Thickness on the Impact Strength of Heat-Affected Zone of the Welded Joint

Effect of the Weld Deposit Thickness on the Impact Strength of Heat-Affected Zone of the Welded Joint

Effect of pulsed electrode wire feeding on formation and wear resistance of deposited bead and losses of electrode metal in CO<sub></sub>2 arc surfacing

A Study of the Influence of Additives of Nanostructured Functional Ceramics in the Coating of Welding Electrodes on their Welding and Technological Properties

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