Study on High Speed Fillet Welding by Tandem Arc MAG Process.

Okui, Nobuyuki; Ohga, Susumu; Saitoh, Takashi; Suzuki, Tomoyuki; Maki, Shigeyoshi; Honma, Hiroaki

doi:10.2207/qjjws.18.555

Cited by 7 publications

(2 citation statements)

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“…The structure of bead weld layers in squitter pulse process were more compact, weld defect were less, and hear-affected zone were smaller. In welding process, the base metal was melted with the function of absorbing large mount heat, and weld metal freezing was accelerate by high conductivity factor and better radiating.By contrast, in successive condition of argon arc welding, the HAZ was extended with the increasing of energy input [5].…”

Section: Resultsmentioning

confidence: 83%

Study on Squitter Pulsed Welding Repairing Technology of ZL105 Alloys

Shen

Meng

Yuan³

et al. 2012

AMR

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An experimental investigation of ac pulsed argon arc welding of the ZL105 alloy was carried out under the condition of existed the defects of the high temperature, the thermal deformation. The surface morphology, microstructure and temperature field of the surfacing layers were investigated. The results showed that the heat accumulation of squitter pulsed welding was less, and with smaller HAZ, crystal grains were thinner in the same conditions. Compared with argon arc welding, the energy of squitter pulse argon arc welding acted on the matrix was less but more centralized, the whole HAZ temperature raised slowly.

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Section: Resultsmentioning

confidence: 83%

Study on Squitter Pulsed Welding Repairing Technology of ZL105 Alloys

Shen

Meng

Yuan³

et al. 2012

AMR

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“…New processes have been developed and operating conditions have been optimized to improve the welding efficiency. For example, tandem GMAW [2][3][4][5][6] and high-current GMAW [7][8][9][10] have been developed and applied as high-efficiency welding processes. However, although these approaches can obtain higher efficiency (i.e., higher deposition rates) than conventional GMAW, they also require a considerably higher heat input, which deteriorates the joint properties (e.g., strength, toughness), especially in the heat-affected zone (HAZ).…”

Section: Introductionmentioning

confidence: 99%

Selection of Welding Conditions for Achieving Both a High Efficiency and Low Heat Input for Hot-Wire Gas Metal Arc Welding

Marumoto,

Fujinaga,

Takahashi

et al. 2024

JMMP

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This study presents a new gas metal arc welding (GMAW) technique that achieves both high efficiency and low heat input using a hybridization of the hot-wire method. The optimal combination of welding speed and welding current conditions was investigated using a fixed hot-wire feeding speed of 10 m/min on a butt joint with a V-shaped groove using 19 mm thick steel plates. Molten pool stability and defect formation were observed using high-speed imaging and cross-sectional observations. The power consumption and heat input were predicted prior to welding and measured in the experiments. The results indicate that a combination of a welding current of 350–500 A and welding speed of 0.3–0.7 m/min is optimal to avoid defect formation and molten metal precedence using three or four passes. The higher efficiency and lower heat input achieved by hot-wire GMAW results in a weld metal of adequate hardness, narrower heat-affected zone, smaller grain size at the fusion boundary, and lower power consumption than those obtained using tandem GMAW and high-current GMAW. Based on the experimental results, a single bevel groove, which is widely used in construction machinery welding joints, was welded using hot-wire GMAW, and we confirmed that the welding part could be welded in six passes, whereas eight passes were required with GMAW only.

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