Abstract

Press-hardened boron steels with ultrahigh strength (above 1500 MPa) are widely used in crash-sensitive safety components in automobiles. Joining such steels to aluminum alloys is challenging due to various factors including the steel’s tenacious Al-Si coating. A novel application of ultrasonic plus resistance spot welding was developed for such dissimilar metal joining. The nugget formation and the interface microstructure especially intermetallics formed were correlated to the joint strength, ductility and failure behavior.

中文翻译：

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超声加电阻点焊铝合金对涂层冷硬硼钢的组织和强度

抽象的

具有超高强度（大于1500 MPa）的冲压硬化硼钢被广泛用于汽车中对碰撞敏感的安全部件。由于各种因素，包括钢的坚韧Al-Si涂层，将此类钢与铝合金连接起来具有挑战性。超声波加电阻点焊在这种异种金属连接中的新应用得到了发展。熔核的形成和界面的微观结构，特别是金属间化合物的形成与接头的强度，延展性和破坏行为有关。