Improved Weldability for Laser Welding Press-Hardened Steel via Thinning Coatings: Part 1 — Microstructure Characterization and Mechanical Testing Article Swipe

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Z.X. Jin , Shangqi Guo , Zhiyong Zhang , Yuqian Wang , Guangming Xie , Z. Li , H. C. Yi ·

YOU? · · 2025 · Open Access · · DOI: https://doi.org/10.29391/2025.104.015

As integrated door rings with high safety are being used for automotive applications, Al-Si-coated press-hardened steel (PHS) is attracting wider attention. However, during laser welding of thickly coated (~30 μm) PHS, excessive ferrite is formed in the weld, so it is necessary to use a filler metal to limit this issue. This work investigated the laser weldability of thinly (~16 μm) and extra-thinly (~10μm) coated PHSs using a low-cost C-Mn filler wire at weld travel speeds of 3–7 m/min. The results indicated that laser welding of PHSs with thinner coatings exhibited better weldability due to a lower volume fraction of ferrite in the weld. However, the thinly coated PHS joint welded at 7 m/min failed at the Al-enriched weld toe, where strip-like ferrite was observed. Al enrichment originated from the coating outside the weld, and the extent of Al enrichment was closely related to the high welding speed.

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Weldability Materials science Microstructure Metallurgy Welding Laser beam welding Characterization (materials science) Composite material Nanotechnology

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Type: article
Language: en
Landing Page: https://doi.org/10.29391/2025.104.015
PDF: https://doi.org/10.29391/2025.104.015
OA Status: diamond
Related Works: 10
OpenAlex ID: https://openalex.org/W4409905963

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OpenAlex ID: https://openalex.org/W4409905963

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DOI: https://doi.org/10.29391/2025.104.015

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Title: Improved Weldability for Laser Welding Press-Hardened Steel via Thinning Coatings: Part 1 — Microstructure Characterization and Mechanical Testing

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Type: article

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Language: en

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Publication year: 2025

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Publication date: 2025-04-01

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Authors: Z.X. Jin, Shangqi Guo, Zhiyong Zhang, Yuqian Wang, Guangming Xie, Z. Li, H. C. Yi

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Landing page: https://doi.org/10.29391/2025.104.015

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Concepts: Weldability, Materials science, Microstructure, Metallurgy, Welding, Laser beam welding, Characterization (materials science), Composite material, Nanotechnology

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Cited by: 0

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