Duplex Treatment
Plasma nitriding + PVD coating
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 Duplex 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!
Some Applications of Duplex Treatment
Blankholder: Segmented tool
Drawing tool: Segmented tool
Treatment DUPLEX-VARIANTIC: Mirror finish in assembled status, 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.
Drawing tool: Segmented version
Treatment DUPLEX-VARIANTIC: Mirror finish in assembled status, 1. 3343, Base hardness 63-64 HRc
Workpiece material: 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. Segmented version.
Substrate: D2 (1.2379), 58-60 HRc
Part: wishbone part, car, CPW 800, 4 mm
Tool: mirror polish by voestalpine eifeler
Coating: Duplex-VARIANTIC
Result: > 1 Mio. parts
Total dimensions: 2500 mm x 1100 mm x 630 mm
Drawing rings: Ø 90 – 100 mm x 70 – 80 mm
Treatment DUPLEX-VARIANTIC: Mirror finish Vanadis 6 / Vanadis 10, Base hardness 62+ 2 HRc, Workpiece material: 1. 4301-DDQ-2 blank Ø 144 mm x 2.6 mm
Lubrication: Esso – drawing oil 60
Status quantity: > 100,000 parts
Result: No visible wear on the coated active segments