Abstract The usage of modern materials in the automotive industry for the body in white construction leads to increasing requirements for the manufacturing process. Due to the limited formability of high-strength aluminium alloys and steels, joining by forming of these dissimilar materials is still a big challenge, which requires suitable and innovative manufacturing technologies. In sheet forming processes the Tailor Heat Treated Blank (THTB) technology allows enhancing the formability of high-strength aluminium alloys. Therefore, the applicability of the THTB technology for the shear-clinching technology is investigated in this paper. Up till now, this innovative joining by forming technology is only qualified to join ductile aluminium alloys and high-strength steels, but the combination of high-strength aluminium and high-strength steel has not been realized yet. In this research work, the limits of the shear-clinching process have been extended to successfully join the material combinations of AA7075 on the punch side and HCT780X, as well as press hardened 22MnB5 on the die side by using aluminium specimens with different heat treatment layouts. Further, this paper shows the possibility to adjust the material flow of the shear-clinching process by local and short-term heat treatment.

中文翻译：

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异型热处理坯料技术在成型接合中的应用

摘要 现代材料在汽车工业中用于白色结构的车身导致对制造过程的要求越来越高。由于高强度铝合金和钢的可成形性有限，这些异种材料的成形连接仍然是一个很大的挑战，需要合适的创新制造技术。在板材成型工艺中，Tailor Heat Treated Blank (THTB) 技术可以提高高强度铝合金的成型性。因此，本文研究了 THTB 技术在剪切铆接技术中的适用性。迄今为止，这种创新的成型连接技术仅适用于韧性铝合金和高强度钢的连接，但目前还没有实现高强度铝与高强度钢的结合。在这项研究工作中，通过使用不同热处理布局的铝试样，成功地连接了冲头侧的 AA7075 和 HCT780X 的材料组合，以及模具侧的压力硬化 22MnB5 材料组合，扩展了剪切铆接工艺的限制. 此外，本文还展示了通过局部和短期热处理来调整剪切铆接过程的材料流动的可能性。