Effect of Zinc Aluminum Magnesium Coating on Spot-Welding Joint Properties of HC340LAD + ZM Steel

Chen, Xiang; Peng, Xinjie; Yuan, Xinjian; Xiong, Ziliu; Lu, Yao; Lu, Shenghai; Peng, Jian

doi:10.3390/app12189072

Cited by 3 publications

(3 citation statements)

References 28 publications

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“…Hot-dip galvanized steel sheets have extensive applications for the manufacture of automobiles, automobile outer plates, supports, and internal parts because of their good weldability, excellent corrosion resistance, and low cost [1], [2]. MAG welding technology is used for manufacturing most of internal components of automobiles [3], [4].…”

Section: Introductionmentioning

confidence: 99%

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An improved simulation of temperature field in Laser–low current

Xu,

Sun,

Han

et al. 2024

Preprint

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This study aimed to achieve efficient and precise connection of thin steel sheets for vehicles by analyzing the thermal process of Laser-MAG hybrid high-speed welding lap of thin galvanized steel sheets. A high-speed camera combined with an NI AD data acquisition system were used, and the transition behavior and electrical signals of low-current MAG and Laser-MAG hybrid welding were examined. The thin sheet MAG welding droplet transition method mainly comprised short-circuit transfer. During the short-circuit phase, the voltage decreased and the current increased sharply, forming a short-circuit liquid column. When current increased to a certain level, the liquid bridge burst, the droplets carried heat and kinetic energy to the weld pool, the arc voltage returned to a no-load state, and the arc was re-ignited. In the arcing phase, the current first decreased steeply and then slowly, while the voltage decreased slowly and smoothly. According to the different heat source characteristics of the arc combustion and short-circuit stages during short-circuit transition, a new MAG heat source for low-current short-circuit transition was developed. This study employed a double-ellipse heat source with different powers for the arc combustion stage as well as a uniform body heat source that considered the thermal and kinetic energies of the melt droplets for the short-circuit stage. The thermal input of low current MAG welding was described by double-ellipse and uniform body heat source periodic loading. Moreover, the laser exerted an attraction and compression influence over the arc during the hybrid welding, which promoted the droplet transfer. Therefore, based on the novel MAG heat source, a hybrid Laser-MAG heat source in the short-circuit transition mode was developed. The laser beam heat source was described using a three-dimensional column heat source, the arc attraction and compression by the laser were considered indirectly through distribution parameter tuning for the double-ellipse model, and the laser-promoted transition effects of the droplets were described through the cycle frequency alterations of a double ellipsoid and homogeneous heat source. this heat source model was used to determine the MAG welding and hybrid welding temperature fields. Using hybrid Laser-MAG welding, a weld with a high depth-to-width ratio and complete penetration was obtained. The weld geometry and weld pool length were determined through welding tests, and the test results coincided with the fusion line trend and shape of the weld obtained by simulation, proving the rationality of the developed heat source model.

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Section: Introductionmentioning

confidence: 99%

“…signify the distribution parameters for the biellipse heat source; 2 K denotes the coefficient; and P are the welding voltage, welding current, and laser power of hybrid welding, respectively; are the arc thermal efficiency and the laser thermal efficiency, respectively, with2 …”

mentioning

confidence: 99%

An improved simulation of temperature field in Laser–low current

Xu,

Sun,

Han

et al. 2024

Preprint

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“…Zinc–aluminum–magnesium steel plates (Zn–Al–Mg steel plates) are a novel type of steel plate composed of materials with low density, high specific strength and stiffness, strong corrosion resistance, high edge protection performance, and high impact resistance [ 1 , 2 , 3 , 4 , 5 , 6 ]. These plates have a stronger corrosion resistance than ordinary galvanized sheets, and their coating can be thinner, which contributes to their light weight.…”

Section: Introductionmentioning

confidence: 99%

Verification of Reinforced Surface Loose Layer of Zinc–Aluminum–Magnesium Steel Plate

Chen,

Yang

2023

Materials

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The corrosion resistance of zinc–aluminum–magnesium steel plates (Zn–Al–Mg steel plates) is significantly higher than that of galvanized steel plates. However, the unsatisfactory bonding performance of Zn–Al–Mg steel plates significantly limits their widespread application. In this study, X-ray photoelectron spectroscopy is employed to detect changes in the surface oxygen content of Zn–Al–Mg steel plates after different temperature treatments to confirm the existence of surface loose layers. In particular, changes in the surface oxygen content of the Zn–Al–Mg steel plates after the oxide layer is removed are investigated under saturated H2O vapor and O2 environmental conditions, and the cause of the formation of loose surface layers is determined. The uneven distribution of elements on the surface of the Zn–Al–Mg steel plates is investigated with scanning electron microscopy and energy dispersive spectroscopy. Nuclear magnetic resonance is employed to determine the size of the network spatial structure formed by silane coupling agents under different hydrolysis conditions and to further investigate the bonding performance of hydrolysate-modified Zn–Al–Mg steel plates. Several typical automotive adhesives are utilized to compare and examine the changes in the tensile strength of the Zn–Al–Mg steel plate bonding before and after modification with the silane coupling agent and analyze the structural damage of the adhesive at the bonding interface. The results confirm that the silane coupling agent strengthens the loose layer on the surface of the Zn–Al–Mg steel plate.

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