Effects of a paraxial TIG arc on high-power fiber laser welding

Zou, Jianglin; Wu, Shikai; Xiao, Rongshi; Li, F.

doi:10.1016/j.matdes.2015.07.110

Cited by 19 publications

(3 citation statements)

References 27 publications

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“…Although the cladding efficiency is high, the precision is poor, the molding size is difficult to control and the test piece has more machining allowance (Hu and Ouden, 2005). Therefore, single arc welding will produce more welding defects such as pores, cracks and lack of fusion (Zou et al , 2015). Laser welding also occupies an important position in modern welding.…”

Section: Introductionmentioning

confidence: 99%

Research on new technology of laser forging coupled arc welding of E690 marine steel

Cai

Zhang

Liu³

2023

RPJ

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Purpose The purpose of this study is to reduce the cracks, pores and unfused defects in arc welding, improve the crystalline structure of the weld, refine its grains and improve the mechanical properties. Design/methodology/approach Taking E690 marine steel as the research object, the experiment adopts a new process method of laser forging coupled arc welding. Welding for comparative experiments. Experiments show that the “V”-shaped groove arc welding process has a larger fusion area, but has pores, the arc current is 168 A, the arc voltage is 28 V and the welding speed is 600 mm/min. Findings It can be seen from tensile tests that the coupling welding process has the highest tensile strength and yield strength, 872 MPa and 692 MPa, respectively, and the fracture elongation is 29.29%. The single-beam laser forging coupled arc welding process has a distance of laser and wire of 6–8 mm, a laser wavelength of 1,064 nm and the highest weld fusion ratio. The microhardness test shows that the average hardness of single-beam laser forging in the weld zone is 487.54 HV, which is 10.30% higher than that of arc welding. The average hardness in the fusion zone is 788.08 HV, which is 14.52% higher than that of the arc welding process. Originality/value The originality of the experiment: proposed a new process method of coupling arc repair for offshore steel forging; adopted a new process method of simultaneous coupling of single-beam short-pulse laser, double-beam short-pulse laser and arc welding; and obtained effect of pulsed laser and arc composite repair on porosity and fusion of E690 marine steel welds.

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Section: Introductionmentioning

confidence: 99%

Research on new technology of laser forging coupled arc welding of E690 marine steel

Cai

Zhang

Liu³

2023

RPJ

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“…J.L. Zou et al [15] in the study of the impact of the paraxial TIG on high-power fiber laser welding, found that laser-arc hybrid welding can reduce the negative impact of plume on welding, thereby improving laser energy utilization and welding penetration. The laser-wire distance and arc current also have a significant effect on the laser plasma plume.…”

Section: Introductionmentioning

confidence: 99%

Research on weld formation mechanism of laser-MIG arc hybrid welding with butt gap

Huang

Zhang

Yan

et al. 2021

Optics & Laser Technology

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At present, there are few researches on laser -MIG arc hybrid welding with a large butt gap. In this paper, laser-MIG arc hybrid welding is used to weld low-alloy high-strength steel with a thickness of 3mm, and a laser-MIG arc hybrid welding process under large gap conditions is developed. This paper studies the effects of arc voltage, laser-wire distance, and wire feed speed on the gap bridging capability of hybrid welding under different butting gaps were studied. Under the condition of the 1mm butt gap, the influence mechanism of laser-wire distance on weld the weld formation of hybrid welding is analyzed by combining high-speed photography, welding current and voltage waveform, the macroscopic and microscopic morphology of the weld. The results show that there are optimal process parameter values for the effects of arc voltage and laser-wire distance on the gap bridging capability of hybrid welding. Adjusting the laser-wire distance can optimize the energy distribution of laser on the welding wire and weld pool, thus controlling the arc current, voltage, and droplet transition mode, and finally affecting the weld penetration and forming. When the laserwire distance is 0mm, the droplet transition frequency is the fastest, and the droplet transition is a mixture of short circuit transition and liquid bridge transition. At this point, the welding rate is the fastest and the welding process is the most stable. However, by comprehensively integrating factors such as the gap bridging capability and the weld penetration, the optimal processing parameters are obtained when the laser-wire distance is 0.5mm.

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“…Strong illuminants are an inherent physical phenomenon during the hot working process, such as the arc plasma in the arc welding process [1,2], the plasma in the laser-arc hybrid welding process [3][4][5] and the plasma/plume during the laser welding process [6,7]. The characteristics of the strong illuminants are closely related to the welding process.…”

Section: Introductionmentioning

confidence: 99%

A multiple synchronous imaging method for strong illuminants induced during a hot working process

Xiao

Zou

et al. 2019

Laser Phys. Lett.

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Strong illuminants that often appear during a hot working process are closely related to the processing. To further reveal the characteristics of strong illuminants through visual observation, the multiple synchronous imaging method for a strong illuminant is proposed in this paper. The strong illuminant-emitted light is reflected and transmitted multiple times between the two non-parallel reflective attenuators. Each time, the light transmits through the second attenuator, and is recorded using a camera. A series of images of illuminants are thus attained. The angle between the two attenuators determines the position of each image; the light transmittance of the attenuator decides the brightness of the images; the number of reflections/transmissions determines the sizes of the filtered-out low light intensity areas. By observing the strong illuminants generated during the hot working process using this method, the morphologies of illuminants with different light intensity areas can be obtained, which is of great significance to understand the hot working process and to optimize the processing in future studies.

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Effects of a paraxial TIG arc on high-power fiber laser welding

Cited by 19 publications

References 27 publications

Research on new technology of laser forging coupled arc welding of E690 marine steel

Research on new technology of laser forging coupled arc welding of E690 marine steel

Research on weld formation mechanism of laser-MIG arc hybrid welding with butt gap

A multiple synchronous imaging method for strong illuminants induced during a hot working process

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