Prevention of coating-induced agglomerations within the weld seam during laser beam deep penetration welding of aluminum-silicon coated press-hardened steel
|Publisher:||BIAS - Bremer Institut für angewandte Strahltechnik GmbH||Abstract:||
Press-hardened steels like 22MnB5 (1.5528) have great potential in terms of their use in the field of lightweight construction. However, due to the aluminum-silicon coating, applied for press-hardening, strength-reducing agglomerations can occur within the seam after laser deep penetration welding of already hardened material. To investigate the hypothesis that the agglomeration formation can be reduced by beam modulation strategies, laser deep penetration welding experiments with changing beam modulation strategies such as “transversal”, “circular” and “vertical eight” shaped patterns were carried out using constant welding speed and laser power. After comparing the resulting cross-sections to coated and decoated samples welded without beam modulation, the hypothesis was found to be true in case of all modulation strategies examined as no agglomerations could be detected within the samples. In addition, in case of the beam modulation strategies “circle” and “vertical eight”, the fracture type could be changed from a separation fracture along the melting line to a shear fracture crosswise to the seam in sheet metal plane comparable to the decoated samples.
|Keywords:||Laser beam welding; beam modulation; agglomeration prevention; aluminum-silicon coating||Issue Date:||Nov-2022||Publisher:||BIAS Verlag||Project:||Verteilung intermetallischer Phasen beim Laserstrahlschweißen von pressgehärteten Stählen||Funders:||Federal Ministry for Economic Affairs and Climate Action, FOSTA||Grant number:||No. 20652 N (P 1215)||Journal/Edited collection:||LAF 2022: Proceedings of the 12th Laser Applications Forum||Start page:||47||End page:||51||Type:||Artikel/Aufsatz||DOI:||10.26092/elib/1874||URN:||urn:nbn:de:gbv:46-elib63125||Institution:||Universität Bremen||Faculty:||Fachbereich 04: Produktionstechnik, Maschinenbau & Verfahrenstechnik (FB 04)||Institute:||BIAS - Bremer Institut für angewandte Strahltechnik GmbH|
|Appears in Collections:||Forschungsdokumente|
checked on Dec 5, 2022
checked on Dec 5, 2022
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