研究目的
Investigating the influence of defocusing distance, welding speed and line energy on the joint properties of laser stake-welded T-joints in EH36 ship structural steel.
研究成果
High-quality laser stake-welded T-joints can be achieved with specific parameters. Misalignment and line energy significantly affect welding quality and angular distortion. The microstructure of the weld zones was characterized, and the tensile properties were found to be influenced by the welding width between panels.
研究不足
The study is limited to EH36 steel sheets of 3 mm thickness and specific welding parameters. The impact of alignment on welding formation was noted as a significant factor not previously considered in many researches.
1：Experimental Design and Method Selection:
The study used fiber laser beam welding (LBW) for stake-welding T-joints in EH36 steel sheets. Optical microscope observation, angular distortion measurement, and tensile tests were conducted to evaluate the joint properties.
2：Sample Selection and Data Sources:
EH36 steel sheets of 3 mm thickness were used. The chemical compositions and mechanical properties of the material were provided.
3：List of Experimental Equipment and Materials:
YLS-5000 fiber laser (IPG, USA) was used for welding. Argon was used as shielding gas. An auxiliary constraining device with clamps was applied to control welding distortion.
4：Experimental Procedures and Operational Workflow:
The welding process was conducted with varying defocusing distances, welding speeds, and line energies. Post-welding, specimens were prepared for metallographic investigation and tensile testing.
5：Data Analysis Methods:
The effects of welding parameters on joint morphology, distortion, microstructure, and mechanical behavior were analyzed.
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