A new, alternative method for joining metals without welding
29.06.2018
When joining metals together, the usual method is welding. This, however, leads to changes in their structure as well as their appearance. Researchers have now developed an alternative that is able to join aluminium alloys with each other and with polymers.
Welding is still the standard technique for joining metals. However, this laborious process carried out at high temperatures is not suitable for all applications. Now, a research team from the “Functional Nanomaterials” working group at Kiel University, together with the company Phi-Stone AG from Kiel, has developed a versatile alternative to conventional welding and gluing processes. Based on a special etching process, it enables aluminium and aluminium alloys to be joined with each other as well as with polymers, forming a durable and strong joint.
The prototype of this mobile joining unit was presented at Hannover Messe in April. The team has announced that it plans to commence mass production in the near future, after receiving feedback from customers.
When welding, components are joined by locally melting them at the connection point. However, the high temperatures required for this procedure influence the material in the so-called heat-affected zone, causing structural as well as optical changes. The process also requires special safety precautions and appropriately qualified staff.