Effect of Laser Welding Parameters on the Microstructure of Lath-martensitic Thin Steel Plates

Fábián, Enikő Réka (2025) Effect of Laser Welding Parameters on the Microstructure of Lath-martensitic Thin Steel Plates. ACTA MATERIALIA TRANSYLVANICA (EN), 8 (2). pp. 55-59. ISSN 2601-8799

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Abstract

In this study lath martensitic microstructure in S235JR and Mn-B alloyed steel sheets were produced. The Mn-B steel used as A and B pilar at autocars Laser welded blanks are an innovative way for automakers to reduce the weight of their vehicles while improving safety at the same time. We created welded joints with different parameters. Welding with 4100mm/min speed the weld metal hardness is similar to the late mar tensitic base material, and only a narrow heat affected zone is softened. Welding with lower speeds resulted softening of the weld metal and a double heat-affected zone: hard next to the weld metal and soft outside it.

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