MultiDiff

Due to the steadily increasing demand for components with internal free structures and large-area joints, diffusion welding is increasingly coming into focus. However, the high investment costs and the sometimes long cycle times at low volumes are perceived as an obstacle. One way to increase the efficiency of the process is to increase the number of components per furnace cycle. The challenge here lies in the homogeneous application of force across all components, which is not process-safe.
The aim of the project is to evaluate and further develop compensation possibilities using compensating bodies in multiple diffusion welding. In two different approaches, the prerequisites for process-reliable multiple welding, the derivation of the necessary boundary conditions and process-engineering limits for multiple welding of components are to be systematically investigated. For the first approach, the suitability of graphite foils as formable intermediate layers is to be investigated in particular. The second approach involves the use of a compensating body consisting of two thin sheets hermetically welded at the edge and filled with a gaseous or liquid medium.