Activity Characterisation of diamond coated steel tools

Internally funded project


Project Details

Project leader:
PD Dr.-Ing. Stefan Rosiwal


Contributing FAU Organisations:
Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle)

Start date: 01/01/2000


Research Fields

Ultra Hard Coatings
Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle)


Abstract (technical / expert description):


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.


Publications
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Schwarz, S., Musayev, Y., & Rosiwal, S. (2001). Diamant auf Stahl. Diffusionschromierung im Vakuum für die CVD-Diamantbeschichtung. Magazin für Oberflächentechnik, 2001(9), 59-62.
Jentsch, H.-G., Rosenbauer, G., Rosiwal, S., & Singer, R. (2000). Graphite interlayer formation during CVD diamond coating of iron base alloys: The analogy to metal dusting. Advanced Engineering Materials, 2(06), 369-374.

Last updated on 2019-03-05 at 11:39