使用蒸发箔致动器对高厚度铝钢板进行异种冲击点焊

IF 2.8 Q3 ENGINEERING, MANUFACTURING Manufacturing Letters Pub Date : 2024-09-01 Epub Date: 2024-08-22 DOI:10.1016/j.mfglet.2024.08.001

Angshuman Kapil , Anupam Vivek , Glenn Daehn

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引用次数: 0

摘要

汽车行业向多材料结构的转变要求铝和钢的高效连接，但高厚度（2 毫米）异种 AA6XXX-HSLA 钢对的连接技术仍未得到充分探索。本研究探讨了用于点焊 2.5 毫米 AA6111-HSLA 340 钢对的蒸发箔激励器焊接，通过搭接剪切测试和显微镜观察证明了接头的成功形成。焊后热处理影响接头强度和断裂行为，焊接界面金属间化合物（IMC）的形成影响机械性能。在热处理后的样品中观察到了 IMC 裂纹。断裂分析显示了焊接区外的材料转移和二次钎焊作用。VFAW 的搭接剪切破坏载荷优于其他连接技术。

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Dissimilar impact spot welding of high-thickness aluminum-steel sheets using vaporizing foil actuators

The automotive industry’s shift towards multi-material structures necessitates efficient joining of aluminum and steel, yet techniques for high-thickness (>2 mm) dissimilar AA6XXX-HSLA steel pairs, remain underexplored. This study explores vaporizing foil actuator welding for spot welding 2.5 mm AA6111-HSLA 340 steel pairs, demonstrating successful joint formation via lap-shear testing and microscopy. Post-weld heat treatment influences joint strength and fracture behavior, with intermetallic compound (IMC) formation at the weld interface affecting mechanical properties. IMC cracking is observed in heat-treated samples. Fracture analysis reveals material transfer and secondary brazing action outside the weld zone. VFAW lap-shear failure loads outperform other joining techniques.

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