Duplex treatment = Plasma nitriding + PVD coating in one process
The combination of a thermochemical plasma nitriding process with the following deposition of a voestalpine eifeler PVD coating in a non-interrupted vacuum system process we call duplex treatment.
The surface hardness of the tool material is definitively increased, which contributes considerably to the increase in performance of the PVD coating.
Therefore we developed a nitriding process, suitable for this procedure and applied it on our alpha 400 and alpha 900 coating systems, where it is performed before the coating process.
Basically all coating- and nitriding-capable steel materials are suited for this process.
Tools are an application emphasis for which this procedure currently is selected regularly and successfully for the forming of high-strength sheet materials. VARIANTIC® or TiCN is often utilized in this manner.
Combinations with other coatings are also possible. For consultation in concrete applications, our executive consultants are available to you at all times.
The following advantages result for you:
- Ideal structure of a hardness gradient from the tough-hard tool core, through a higher supporting hardness in the interface, extending to the extremely hard and wear resistant tool surface.
- A considerably increased support effect therefore results for the extremely hard and brittle ceramic wear protection layer.
- The absorbing ability for pressure loads increases significantly!
Example applications for the duplex treatment:
Blankholder: Segmented tool
Drawing tool: Segmented tool
Treatment Duplex-VARIANTIC®: Mirror finish in assembled status
Material: 1.2379
Base hardness: 58–60 HRC
Workpiece material: CPW 800; 1,7 mm
Lubrication: minimum coil greasing (2 g/m2)
Status quantity: >120.000 parts
Result: The optimized and hard-coated surfaces do not indicate any visible wear traces.
In comparison without coating: A repolishing of the functional surfaces is required every 5000 parts.
Blankholder: Segmented tool
Drawing tool: Segmented tool
Treatment Duplex-VARIANTIC®: Mirror finish in assembled status
Material: 1.3343
Base hardness: 63–64 HRC
Werkstückstoff: CPW 800; 1,8 mm
Lubrication: Coil greasing, slight oiling
Status quantity: >300.000 parts
Result: The optimized and hard-coated surfaces do not indicate any visible wear traces.
Total dimensions: 2.500 mm x 1.100 mm x 630 mm
Drawing rings: Ø 90–100 mm x 70–80 mm
Treatment Duplex-VARIANTIC®: Mirror finish
Material: Vanadis 6/Vanadis 10
Base hardness: 62 HRC
Workpiece material: 1.4301-DDQ-2
Platinum: Ø 144 mm x 2,6 mm
Lubrication: Esso – Umformöl 60
Status quantity: >100.000 parts
Result: No visible wear on the coated active segments.
Workpiece: Querlenkerschale Pkw CPW 800, 4 mm
Tool: 1.2379
Base hardness: 58–60 HRC
Treatment Duplex-VARIANTIC®: Mirror finish in assembled status
Material: 1.2379
Base hardness: 58–60 HRC
Standmenge: 1 Mio. Hub
