An Alternative Approach for the Cost-efficient Laser Welding of Zinc-coated Sheet Metal

Bley, Helmut; Weyand, Lars; Luft, Axel

doi:10.1016/j.cirp.2007.05.006

Cited by 32 publications

(11 citation statements)

References 5 publications

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“…New material and new forming methods have been adopted to reduce the weight on condition of no increasing cost but maintaining function and shock resistance. Requirements for improving durability in vehicle structure have led to the wide use of galvanized steel sheets as a corrosion resistant material [1][2][3][4][5]. Because of its high strength and toughness, better performance both in high and low temperature, high resistance to abrasion and corrosion, high-strength galvanized steel has attracted great attention in many academic research and industry applications [6,7].…”

Section: Introductionmentioning

confidence: 99%

Research on laser welding of high-strength galvanized automobile steel sheets

Mei

Chen

Jin

et al. 2009

Optics and Lasers in Engineering

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Section: Introductionmentioning

confidence: 99%

Research on laser welding of high-strength galvanized automobile steel sheets

Mei

Chen

Jin

et al. 2009

Optics and Lasers in Engineering

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“…Compared with traditional arc welding technique, laser welding has its own advantages, such as a high power density, and the associated ability to make a narrow weld with a narrow HAZ, using a low heat input with a high welding speed, and achieving lower levels of residual stress and distortion, while consuming less filler material [18,19]. In addition, laser welding can be realised using remote control, because a laser beam can be delivered using an optical fiber and the welding head can be mounted on an industrial robot.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and mechanical characteristics of a laser welded joint in SA508 nuclear pressure vessel steel

Guo

Dong

Francis

et al. 2015

Materials Science and Engineering: A

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a b s t r a c t SA508 steels are typically used in civil nuclear reactors for critical components such as the reactor pressure vessel. Nuclear components are commonly joined using arc welding processes, but with design lives for prospective new build projects exceeding 60 years, new welding technologies are being sought. In this exploratory study, for the first time, autogenous laser welding was carried out on 6 mm thick SA508 Cl.3 steel sheets using a 16 kW fiber laser system operating at a power of 4 kW. The microstructure and mechanical properties (including microhardness, tensile strength, elongation, and Charpy impact toughness) were characterized and the microstructures were compared with those produced through arc welding. A three-dimensional transient model based on a moving volumetric heat source model was also developed to simulate the laser welding thermal cycles in order to estimate the cooling rates included by the process. Preliminary results suggest that the laser welding process can produce welds that are free of macroscopic defects, while the strength and toughness of the laser welded joint in this study matched the values that were obtained for the parent material in the as-welded condition.

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“…An increasing number of manufacturers choose laser welding technologies in assembling due to their abundant advantages [1] like reduction of cycle times, high potential for automation, and high process efficiency [2]. Thereby, two different welding modes can be distinguished: deep-penetration and heat-conduction laser welding.…”

Section: Introductionmentioning

confidence: 99%

Decreasing pore formation in multiple-sheet laser joining with interfacial polymeric contaminations

2015

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Deep-penetration laser welding is an efficient joining technology for overlap joints nowadays. However, contaminations usually having a lower vaporization temperature can cause seam defects like pores and melt ejections during the process. Many approaches have been investigated, e.g., for the industrially interesting case of welding zinc-coated steel sheets. Suitable techniques for sufficient reduction or avoidance of porosity require additional process steps or timeconsuming preparations. In this paper, three-sheet joints having polymeric interlayers as exemplary extensive contaminations are investigated. Seams feature extreme porosity after standard single-pass welding. The porosity can be decreased significantly when repeating the welding process (double-pass welding). This effect on formation of porosity is modified in this paper. Instead of two processes, longitudinal beam oscillation is applied. The center porosity in longitudinal sections, used as indicator for the porosity of seams, can be reduced significantly from more than 50 to 20 % by using the beam oscillation technique. As the main reason, the increased degassing time due to the lengthening of the melt pool depending on oscillation parameters is identified. Simultaneously, the results indicate that the seam width must not increase similarly to avoid that further evaporation of contamination material cancels out the achieved benefit by lengthening.

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An Alternative Approach for the Cost-efficient Laser Welding of Zinc-coated Sheet Metal

Cited by 32 publications

References 5 publications

Research on laser welding of high-strength galvanized automobile steel sheets

Research on laser welding of high-strength galvanized automobile steel sheets

Microstructure and mechanical characteristics of a laser welded joint in SA508 nuclear pressure vessel steel

Decreasing pore formation in multiple-sheet laser joining with interfacial polymeric contaminations

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