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This experimental study investigates the impact of key Laser-TIG (L-TIG) welding parameters on the tensile strength (σk) of butt-welded Copper Alloy - Carbon Steel - Copper Alloy Trimetal Composites. The effects of laser power, welding speed and initial gap were investigated using a Smats 5Z-200 automated welding system. Based on the orthogonal experimental design approach developed by the Moscow Institute of Steel and Alloys, preliminary experiments (Step 1) were conducted at 15 selected nodes within the N27 full factorial plan. The results reveal that the initial gap exerts the most significant impact on tensile strength, while laser power and welding speed play secondary roles. These findings establish a basis for further experimental stages (Step 2), aimed at building a regression model to predict and optimize L–TIG welding performance for dissimilar metal composites.

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Research on the Effect of Laser-TIG Welding Parameters on Tensile Strength of Copper Alloy – Carbon Steel – Copper Alloy Trimetal Composites Joints

  • 会议论文

  • 发表日期：

    2026年

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  • Van Me Nguyen,
  • Minh Hung Ha,
  • Thu Quy Le,
  • Hoang Quan Nguyen,
  • Trong Binh Ngo,
  • Van An Dang

摘要

This experimental study investigates the impact of key Laser-TIG (L-TIG) welding parameters on the tensile strength (σk) of butt-welded Copper Alloy - Carbon Steel - Copper Alloy Trimetal Composites. The effects of laser power, welding speed and initial gap were investigated using a Smats 5Z-200 automated welding system. Based on the orthogonal experimental design approach developed by the Moscow Institute of Steel and Alloys, preliminary experiments (Step 1) were conducted at 15 selected nodes within the N27 full factorial plan. The results reveal that the initial gap exerts the most significant impact on tensile strength, while laser power and welding speed play secondary roles. These findings establish a basis for further experimental stages (Step 2), aimed at building a regression model to predict and optimize L–TIG welding performance for dissimilar metal composites.