Analysis of process parameter effects during narrow-gap triple-wire gas indirect arc welding

Fang, Disheng; Li, Liming

doi:10.1007/s00170-016-8802-2

Cited by 13 publications

(6 citation statements)

References 17 publications

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“…In the system, the workpiece never needs to be plugged in, while the main wire and the two wires were connected with the negative pole and the positive pole of the two power sources, respectively. This method has been successfully used in narrow gas welding [ 24 , 25 ].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Integrated Circular Triple-Wire Pulse GMAW of Q960E High-Strength Steel for Construction Machinery

Wang

Duan³

et al. 2021

Materials

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Multi-wire welding has received much attention in the machinery industry due to its high efficiency. The aim of this study was to investigate a novel pulse gas metal arc welding (GMAW) that has circular triple-wire electrodes. The effect of the pulse phage angle on arc stability was particularly studied. Research showed that for typical phase angles the arc stability from low to high is 180°, 0°, and 120°, and the arcs are very stable at 120°. The triple-wire welding was used to weld a 9 mm thick Q960E steel, which is typically used for the arm of construction machinery. When the welding heat input was controlled at 1.26–1.56 kJ/mm, the weld zone was dominated by acicular ferrite, and the coarse-grained zone of the heat-affected zone was a mixed structure of lath martensite and lath bainite. The tensile strength of the welded joint reached 85% of the base metal and the impact toughness was above 62 J, which can meet the requirements of construction machinery. This indicates that the triple-wire welding has great potential to achieve efficient and high-quality welding for the construction machinery.

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Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Integrated Circular Triple-Wire Pulse GMAW of Q960E High-Strength Steel for Construction Machinery

Wang

Duan³

et al. 2021

Materials

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“…In recent years, the researches on TW-GIAW mainly focused on the medium and thick plate welding, droplet transfer and weld formation, but the field regarding the applicability of TW-GIAW for AM has not been reported [14][15][16][17]. According to the research of Fang et al [15], there was a convex weld formed in the TW-GIAW, which was not conducive to the next weld layer complete fusion. Although the bypass coupling technology has been applied on TW-GIAW to solve this problem [18].…”

Section: Introductionmentioning

confidence: 99%

Continuous contact transfer behavior in bypass coupling triple-wire indirect arc welding

Liu,

Xu,

et al. 2024

Preprint

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Continuous contact transfer mode in bypass coupling triple-wire indirect arc welding (BCTW-GIA) is proposed to pursue an optional way to ensure the high deposition rate and obtain stable depositing process. The arc behaviors, droplet transfer and process stability with different distance between the tips (d1) of the main wire and side wires and the feeding speed of main wire (FSM) were studied. With the increase d1 and FSM, the droplet transfer mode of main wire varied from explosive transfer to short-circuit transfer to bridge transfer. When the d1 was greater than 4 mm, the continuous contact transfer bypass coupling triple-wire indirect arc welding can be realized and the welding process stability was improved. With the d1 adjusted from 0 mm to 6 mm, the standard deviation of the current dropped from 123.8 to 53.8 and its variation coefficient from 117.33–39.24% at FSM = 1 m/min. The weld penetration and weld width reduced with the FSM increasing, while the weld reinforcement gradually increased.

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“…Yang and Guo et al [16,17] optimized the narrow-gap welding torch with a rotating arc. Liu et al [18][19][20] designed a narrowgap gas shielded three-wired indirect arc welding torch, greatly improving the welding efficiency. After the narrow-gap three-wired indirect arc, a tungsten electrode arc was used, making the convex shape of the weld surface change into a concave shape.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Oscillation Parameters on the Formation of Overhead Welding Seams in the Narrow-Gap GMAW Process

et al. 2023

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Thick-walled X80 pipelines for oil and gas transportation are difficult to relocate due to their large size. In the process of narrow-gap overhead welding, welding defects, such as bulges and lack of sidewall fusion, can appear easily. To avoid these defects and to improve the welding quality of thick-walled pipelines, the GMAW welding method is adopted in this paper. The formation characteristics of the weld and the influence of arc oscillation parameters, such as the oscillation width and sidewall dwell time, on the formation process of narrow-gap overhead welding seams are studied. In this research, it was found that, in the NG-GMAW overhead welding position, there was a downward trend in the middle of the formed surface of the weld pool. Defects, such as finger-shaped penetrations and lack of sidewall fusion, were prone to occur due to gravity. The increased oscillation width was beneficial for reducing the protrusion in the middle of the weld seam, but an excessive oscillation width can easily cause undercut defects. The sidewall dwell time has little effect on the protrusion in the middle of the weld seam, but it can increase sidewall penetration, thereby avoiding the occurrence of incomplete sidewall penetration.

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Analysis of process parameter effects during narrow-gap triple-wire gas indirect arc welding

Cited by 13 publications

References 17 publications

Experimental Investigation of Integrated Circular Triple-Wire Pulse GMAW of Q960E High-Strength Steel for Construction Machinery

Experimental Investigation of Integrated Circular Triple-Wire Pulse GMAW of Q960E High-Strength Steel for Construction Machinery

Continuous contact transfer behavior in bypass coupling triple-wire indirect arc welding

The Influence of Oscillation Parameters on the Formation of Overhead Welding Seams in the Narrow-Gap GMAW Process

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