Analysis of alloy influence on THE JOINT FORMATION IN compound forging of geared steel-aluminium components
Analysis of alloy influence on THE JOINT FORMATION IN compound forging of geared steel-aluminium components
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DOI：
10.37904/metal.2020.3487
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发表时间：
2020
影响因子：
--
通讯作者：
B. Behrens;K. Brunotte;P. Kuwert
中科院分区：
文献类型：
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作者：
B. Behrens;K. Brunotte;P. Kuwert
为了减少二氧化碳排放，轻量化结构和钢铝组件的使用在当前的产品开发中变得越来越重要。在制造此类部件时，这些材料不同的化学和物理性质导致在连接期间形成冶金结合方面的重大挑战。特别是，化学成分对接头性能有重大影响，因此在焊接技术中已经得到了深入研究。关于成形技术，出现的问题是，这些发现是否可以转移到同时成形和连接的制造钢铝复合锻造部件。因此，在本研究范围内，使用粉末冶金法将铝工件与规定量的常见焊接添加剂（如锌、镍和硅）合金化。随后，将这些工件与钢一起锻造，并进行金相检查。研究表明，所用合金结构的复合锻造基本上是可能的-然而，结合形成随不同的化学成分而显着变化。与锌和硅合金化导致液相线温度降低，从而导致熔化。相比之下，与镍合金化导致扩展的连接区，并有利于最大的机械负载能力。
In order to reduce CO2 emissions, lightweight constructions and the use of steel-aluminium components have become increasingly important in current product development. When manufacturing such components, the dissimilar chemical and physical properties of these materials lead to major challenges in terms of metallurgical bond formation during joining. In particular, chemical compositions have a major impact on the joint properties and have therefore already been intensively investigated in welding technology. With regard to forming technology, the issue arises whether these findings can be transferred to simultaneous forming and joining for the manufacturing of steel-aluminium components by compound forging. In the scope of this study, aluminium workpieces were therefore alloyed with defined amounts of common welding additives such as zinc, nickel and silicon using powder metallurgy. Subsequently, these workpieces were forged together with steel and subjected to metallographic examination. The studies show that compound forging of the used alloy configurations is basically possible – however, bond formation varies significantly with different chemical composition. Alloying with zinc and silicon results in a reduced liquidus temperature and consequently in melting. In contrast, alloying with nickel leads to an extended joining zone and benefits the maximal mechanical load capacity.