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首页> 外文期刊>Reviews on Advanced Materials Science >Laser Overlap Welding of Zn-coated Steel on Aluminium Alloy for Patchwork Blank Applications in the Automotive Industry
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Laser Overlap Welding of Zn-coated Steel on Aluminium Alloy for Patchwork Blank Applications in the Automotive Industry

机译：铝合金拼焊毛坯在汽车工业中用于铝合金上的锌涂层钢的激光重叠焊接

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The new generation of cars have to fulfil the strict regulations regarding fuel consumption and gas emission. Thus, lightweight structures are becoming an increasingly critical target in the car body design. At the same time, other indispensable design obligations, such as safety, ride quality and affordability, also have to be met. Tailor welded blank (TWB) and welded patch- work blank techniques have been extensively used in the automotive industry as an effective way of weight reduction and stiffness improvement. TWBs capacitate further weight and strength optimisation in design by integrating sheets of different materials with different thicknesses and/ or coatings into one part. Local reinforcement with welded patchwork blanks also contributes to the weight reduction and crashworthiness of the car body. The laser welding of tailored and patchwork blanks made of galvanised steel and aluminium is widely used in the automotive industry. The weld between Zn-coated steel and aluminium commonly suffers from defects such as spatter, cavity and crack. The vaporisation of Zn is commonly known as the main source of instability in the weld pool and cavity formation, especially in a lap joint configuration. Cracks are mainly due to the brittle intermetallic compounds growing at the weld interface of aluminium and steel. This study provides a review on the main metallurgical and mechanical concerns regarding laser overlap welding of Zn-coated steel on Al-alloy and the methods used by researchers to avoid the weld defects related to the vaporisation of Zn and the poor metallurgical compatibility between steel and aluminium.
机译：新一代汽车必须满足有关油耗和气体排放的严格规定。因此，轻质结构已成为车身设计中越来越重要的目标。同时，还必须满足其他必不可少的设计义务，例如安全性，行驶质量和负担能力。裁缝毛坯（TWB）和拼焊毛坯技术已在汽车工业中广泛使用，作为减轻重量和提高刚度的有效方法。 TWB通过将具有不同厚度和/或涂层的不同材料的片材集成到一个零件中，在设计中实现了进一步的重量和强度优化。带有焊接拼缝毛坯的局部加固也有助于减轻车身重量和提高耐撞性。由镀锌钢和铝制成的拼缝和拼凑毛坯的激光焊接广泛用于汽车工业。镀锌钢与铝之间的焊缝通常会出现飞溅，空洞和裂纹等缺陷。锌的汽化通常是焊缝池和型腔形成中不稳定性的主要来源，尤其是在搭接结构中。裂纹主要是由于脆性的金属间化合物在铝和钢的焊接界面处生长。这项研究综述了铝合金上锌涂层钢的激光重叠焊接的主要冶金和机械问题，以及研究人员为避免与锌的汽化以及钢与钢之间冶金相容性差有关的焊接缺陷而使用的方法。铝。

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