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Laser wire filling welding was employed to fuse 45 steel and 316L stainless steel of varying thicknesses. This research focuses on analyzing the weld seam formation and mechanical characteristics of the welded joints when subjected to different butt gap sizes. The findings reveal a trend: as the butt gap widens, the residual height of the weld decreases progressively, and the weld's shape evolves from a T-shape to an H-shape. Regarding tensile strength, it initially rises with increasing butt gap but then experiences a decline. Notably, a butt gap of 0.6 mm produces the most optimal results, yielding not only the most favorable surface morphology but also the highest tensile strength of the welded joints.

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The Effect of Butt Gap on Forming and Welding Performance of Laser Filler Wire Welded Joint

  • 会议论文

  • 发表日期：

    2026年

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  • Peng Li

摘要

Laser wire filling welding was employed to fuse 45 steel and 316L stainless steel of varying thicknesses. This research focuses on analyzing the weld seam formation and mechanical characteristics of the welded joints when subjected to different butt gap sizes. The findings reveal a trend: as the butt gap widens, the residual height of the weld decreases progressively, and the weld's shape evolves from a T-shape to an H-shape. Regarding tensile strength, it initially rises with increasing butt gap but then experiences a decline. Notably, a butt gap of 0.6 mm produces the most optimal results, yielding not only the most favorable surface morphology but also the highest tensile strength of the welded joints.