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<p>The effects of the baking temperature and time on the mechanical properties of Al-Mg-Si alloys laser-arc hybrid welds were investigated. Increasing the baking temperature promoted the precipitation of the nano-sized βʹ, efficiently enhancing the weld seam. Owing to this, the microhardness of the weld seam increased to 96.0 ± 2.4 HV with the high-temperature baking process (220 ℃-0.5&#xa0;h), leading to a 13% increase in tensile strength. Consequently, the joint coefficient of Al-Mg-Si alloy laser-arc hybrid welded joints reached 0.7, meeting the requirements for automotive industrialization.</p> Graphical Abstract <p></p>

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High-Temperature Baking Strengthen the Al-Mg-Si Alloy Laser-Arc Hybrid Weld Seam

  • 期刊论文

  • 发表日期：

    2025年4月15日

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  • Xiaming Chen,
  • Qin Xu,
  • Xia Wei,
  • Pengcheng Huan,
  • Xiaonan Wang

摘要

The effects of the baking temperature and time on the mechanical properties of Al-Mg-Si alloys laser-arc hybrid welds were investigated. Increasing the baking temperature promoted the precipitation of the nano-sized βʹ, efficiently enhancing the weld seam. Owing to this, the microhardness of the weld seam increased to 96.0 ± 2.4 HV with the high-temperature baking process (220 ℃-0.5 h), leading to a 13% increase in tensile strength. Consequently, the joint coefficient of Al-Mg-Si alloy laser-arc hybrid welded joints reached 0.7, meeting the requirements for automotive industrialization.

Graphical Abstract