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首页> 外文期刊>Science and Technology of Welding and Joining >Dissimilar metal joining of aluminium to zinc-coated steel by ultrasonic plus resistance spot welding - microstructure and mechanical properties
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Dissimilar metal joining of aluminium to zinc-coated steel by ultrasonic plus resistance spot welding - microstructure and mechanical properties

机译：通过超声波加耐抗焊接光斑焊接铝对镀锌钢的不同金属连接 - 微观结构和机械性能

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摘要

Vehicle body structures are increasingly utilising multi-materials designs with advanced high strength steels (AHSS) and aluminium alloys. A robust process for joining aluminium alloys to AHSS based on resistance spot welding (RSW) is essential to widespread application of such bi-metallic structures in fuel-efficient vehicles. In this study, ultrasonic plus RSW was applied to join AA6022 to Zn-coated dual-phase steel DP980. During solid-state ultrasonic spot welding, an interface structure comprising multilayer, Al-Zn and Zn-Fe intermetallics formed due to alloying of aluminium with steel coating. Such structure was subsequently melted into the aluminium nugget, and new Al-Fe intermetallics formed during RSW. Ultrasonic plus resistance spot-welded joints had superior fracture energy than direct resistance spot-welded joints.
机译：车身结构越来越多地利用具有先进的高强度钢（AHSS）和铝合金的多材料设计。 基于电阻点焊（RSW）的铝合金加入铝合金至AHS的鲁棒方法对于燃料效率车辆中的这种双金属结构广泛应用于广泛应用。 在该研究中，施加超声波Plus RSW加入AA6022至Zn涂覆的双相钢DP980。 在固态超声波点焊期间，由于具有钢涂层的铝的合金化而形成的包含多层，Al-Zn和Zn-Fe金属间金属间的界面结构。 随后将这种结构熔化到铝块中，并在RSW期间形成的新的Al-Fe金属间金属间金属间金属间金属间化合物。 超声波加电阻点焊接头具有优于直接电阻点焊接头的较高的断裂能量。

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