Joining Technology

The materials described in the Products section can be reliably joined and joined by a substance-to-substance bond to a wide variety of support materials using various techniques, all of them performed at our factory, and then machined as per drawing. An essential field of application is use as contact components in electrical engineering for low-, medium- and high-voltage applications..

Common support materials

electronic copper
CuCrZr
oxygen-free copper
brass, lead-free
Al bronze
mild steel
stainless steel
cast steel

Joining processes

Brazing

Torch brazing as a standard brazing process
Furnace brazing under a reducing protective gas atmosphere
Vacuum brazing with active solder for special surfaces
Resistance brazing

Welding

Electron beam welding for welding depths of up to max. 25 mm
Magna flash welding (percussion or flash-butt welding for solid cylinders)

Backcasting

Sophisticated process for backcasting copper to tungsten copper.
Used to produce a copper layer that can be welded. Copper or steel supports cannot be welded directly to tungsten copper by an electron beam.

Louis Renner GmbH - Powder Metallurgy