Independent consulting removed from technology brands, customer relations geared to long-term partnerships, enhanced efficiency and cost-effectiveness − these are the objectives to which the Surface Treatment Division is committed.
Due to their wide-ranging expertise and competences, it is easy for our technical consultants to find the perfect solution for our customers’ demands. Their broad, sector-spanning knowledge is an ideal basis for providing tailored consulting services that incorporates a spectrum, ranging from suggestions for improved construction and design of tools, through defining optimum tool treatment, all the way to process details.
Hard-material coating
With correct application, our CVD, PVD and PA-CVD coating processes guarantee significant extension of service duration and contribute towards improvement of slide and anti-friction properties for tools under abrasive loads.
CVD (Chemical vapour deposition)
- Highest degree of hardness and adhesion strength;
- Extension of service life, even for processing of high-strength metal sheets;
- Also for tools with close tolerances;
- Special performance increase in combination with CHOHPlus and other special materials.
Fields of application:
- Cold-forming tools;
- Heavy-duty tools;
- Hard-metal tools;
- Solid forming.
PVD (Physical vapour deposition)
- Highly efficient coating without changes in shape and dimension;
- Protection against abrasion and adhesion on the tool;
- Improved connection of coating due to duplex process;
- Protection of tools and reduction of adhesions in plastics processing;
- Head-start advantage due to continuous improvement of coat systems.
Fields of application:
- Metal sheet forming;
- Cold solid forming tools;
- Aluminium and non-ferrous metal processing;
- Punching and metal cutting tools;
- Plastics processing (polymer processing).
PA-CVD (Plasma-assisted chemical vapour deposition)
Advantages:
- Coating of complicated geometries;
- New coat systems for special applications (hydroforming, mould construction, aluminium die-casting);
- Cost-effective coating, even of large tools.
Fields of application:
- Plastics processing;
- Metal sheet forming;
- Aluminium processing;
- Die-casting;
- High-temperature applications;
- Hot forming;
- Extrusion moulding.
PVD-AlCrN (New coating system)
Excellent hot hardness and oxidation resistance are just two of the various properties, that characterize Dörrenberg’s new high-performance coating. It ensures better performance and durability of tools in plastics extrusion or in press hardening.
PVD-AlCrN coating is used for heavy-duty hot-forming, punching and cutting tools and for aluminium die-casting.
Heat treatment
Vacuum heat treatment
- Creating cost and competitive advantages;
- Specialisation in high-performance materials;
- Optimised scheduling of assignments;
- High unit weights;
- Customized batch management.
Fields of application:
- Cold-working steels;
- Hot-working steels;
- High-speed steels.
Plasma nitriding
- The basis for longer service life;
- Customized processes;
- State-of-the-art system technology;
- High unit weights;
- Process for tools and machine components.
Fields of application:
- Internal high pressure forming tools;
- Machine components;
- Cold-working tools;
- Hot-working tools.
NOX
- Solid shaping and forming with black thread fillets;
- Improved service lives for thread rolling tools;
- Best results due to combination of high hardness and sufficient durability of the thread and tread grooves.
Fields of application:
- Thread rolling dies;
- Thread rolling devices;
Induction hardening
- State-of-the-art system technology ensures economic advantages;
- Protection against wear and washout of distinctive lines;
- Quality advantages in connection with wide hardening paths;
- Cost advantages due to use of grey cast iron materials.
Fields of application:
- Drawing tools;
- Blank holders;
- Dies;
- Cutting knives;
- Machine components.