Steel tools

For Aluminium high pressure die casting, different diamond coated steel tools with TiNB-intermediated layers are applied at industrial partners. The lifetime of bending tools can be increased from a few weeks to several months.

Diamond coated steel sonotrodes for the ultrasonic welding of Aluminium cables are currently also being tested by industrial partners.

The CVD diamond layer can permanently inhibit the reaction of the tool surface with liquid or solid Aluminium. The necessary strength of the steel must be adjusted after every heat treatment, which is steel specific, to avoid material failure due to insufficient fatigue strength. The CVD diamond coating of Tungsten tools is being researched as an alternative or as an addition to the high temperature intermediate layer to avoid special heat treatments.

Active researcher(s):

M.Sc. Thomas Helmreich