TTI Group Heat Treatment & Surface Treatment
Surface Engineering and Heat Treatment Specialists

Duplex

Surface Treatment



Available at:

Birmingham

 

Commonly

Treated

Materials

 

1.2379 (BD2)

1.2344 (H13)

Nitriding Steels





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Head Office: TTI Group Ltd, 39-43 Bilton Way, Luton, Bedfordshire, LU1 1UU, UK

Tel: 01582 544600  Fax: 01582 488394



Duplex Surface Treatment

Duplex Surface Treatment as the name implies, is the application of two processes to the surface of steels. In the case of the IONTEC-H range of Duplex processes TTI provide, Plasma Nitriding steels before applying a hard PVD Coating always significantly enhances the tool life. The hard nitride layer beneath the PVD coating supports the coating under high forces applied to the surface of tools during operation.
 
Although a lot of the steels which are IONTEC-H treated by TTI Group are press tool forming dies (where outstanding results have been achieved), the Duplex Surface Treatment process can, and is, applied very successfully to components, where the steel substrate is normally not hard enough to work in the application. Nitriding the steel before application of the wear resistant PVD coating improves fatigue and indentation resistance. This allows the coating to function correctly.

IONTEC-HV Duplex surface treated steels
Case Study #1 – Press Tool

Uncoated BD2 press tool hardened to 58-60Rc repeatedly in tool maintenance for press repair for scoring. 13 tool maintenance notes were raised and associated excessive downtime in press. Maintenance cost estimated at £7K.

Since the press tool was IONTEC-HV Duplex treated at a cost of £900, zero maintenance has been required and the tool has made >600K components.

Since treatment (4 years) there has been no downtime in press for scoring

Case Study #2 - Cropping Punch

BD2 cropping punch hardened to 58-60Rc produces slide links for industrial chain. The chain material is 6mm thick En19T.

AIM: To increase the life of the tool, by reducing flank wear.

Links produced untreated 2K
Links produced after TiCN coating 12K

Links produced after IONTEC-HT Duplex surface treatment >60K

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