Contract heat treatment group for heat treatment of metal components at four locations in Germany
VTN – Die Härtereien (VTN-Gruppe / IHI VTN GmbH)
Witten (Herbede) · Witten (Annen) · Bielefeld · WilthenNew on Amplifa
About VTN – Die Härtereien
The VTN Group is a medium-sized company in the heat treatment of metals with four plants in Germany: Witten Herbede, Witten Annen, Bielefeld and Wilthen. The range of services includes vacuum hardening, nitriding and nitrocarburizing, low-pressure carburizing, case hardening and carbonitriding, quenching and tempering, as well as hardening and tempering. In addition, the group offers induction hardening in the HF, MF and ZF frequency ranges, with the matching inductors for induction heating developed and built in-house. Metallic workpieces are treated from small parts to large components such as landing gear of passenger aircraft. Customers come from among others mechanical engineering, automotive, medical technology, agricultural industry, tool and die making, aerospace and environmental technologies. Since the end of 2015, the VTN Group has been part of IHI Corporation, Tokyo.
- Site
- Witten
- Processes
- Vacuum hardening, Nitriding / Nitrocarburizing, Low-pressure carburizing, Case hardening / Carbonitriding, Quenching and tempering / Hardening and tempering, Induction hardening (surface hardening, HF/ZF/MF frequency ranges), Induction hardening (HF/ZF/MF), Development and construction of inductors for induction heating
- Materials
- Metals (workpieces for heat treatment), Heat Treatment, Induction Hardening (HF/ZF/MF), Vacuum Hardening, Nitriding / Nitrocarburizing, Low-Pressure Carburizing, Case Hardening / Carbonitriding, Quenching and Tempering / Hardening and Tempering
- Certificates
- Certified service / VTN quality
- Founded
- 1958
- Industries
- Mechanical engineering, Automotive, Medical technology, Agricultural industry, Toolmaking, Aerospace
- 01
Technical consulting
- 02
Heat treatment (vacuum hardening, nitriding, carburizing, case hardening,
- 03
Inductor development and construction in-house
- 04
Materials testing and quality assurance
- 05
Shipping
Processes and Materials
Heat Treatment
Contract finishing of metal components using hardening and tempering processes, including vacuum hardening, nitriding and low-pressure carburizing.
Induction Hardening (HF/ZF/MF)
Partial surface hardening of even complex-shaped workpieces by means of electromagnetic induction.
Vacuum Hardening
Hardening under protective atmosphere in vacuum for low-distortion, oxide-free components.
Nitriding / Nitrocarburizing
Thermochemical treatment to increase the wear and fatigue strength of steel components.
Low-Pressure Carburizing
Carburizing at low pressure for deep carburizing depth and uniform surface hardness.
Case Hardening / Carbonitriding
Hardening of components with a soft core and wear-resistant surface zone.
Quenching and Tempering / Hardening and Tempering
Heat treatment to establish defined strength and toughness properties.
Locations
Witten (Herbede)
DEHeat treatment plant, registered office of IHI VTN GmbH
- Materials
- Metals (steel)
- Heat treatment systems
Witten (Annen)
DEHeat treatment plant
- Materials
- Metals (steel)
- Fully automated chamber furnaces
Bielefeld
DEHeat treatment plant (VTN Fritz Düsseldorf GmbH)
- Materials
- Metals (steel)
- Heat treatment systems
Wilthen
DEHeat treatment plant (VTN Wilthen GmbH)
- Materials
- Metals (steel)
- Heat treatment systems
Treated Components
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Vacuum hardeningHeat treatment | – | – | – | – | Metals (steel) |
| Nitriding / NitrocarburizingHeat treatment | – | – | – | – | Metals (steel) |
| Low-pressure carburizingHeat treatment | – | – | – | – | Metals (steel) |
| Case hardening / CarbonitridingHeat treatment | – | – | – | – | Metals (steel) |
| Quenching and tempering / Hardening and temperingHeat treatment | – | – | – | – | Metals (steel) |
| Induction hardening (surface hardening, HF/ZF/MF frequency ranges)Heat treatment | – | – | – | – | Metals (steel) |
2 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Induction systems (induction hardening, HF/ZF/MF) | – | – | – | – | – |
| Inductor manufacturing (development and construction of inductors in-house) | – | – | – | – | – |
Additional services
Quality
VTN works with certified service and guaranteed VTN quality; materials testers create test reports and maintain the inspection documentation in close coordination with production. In occupational safety as in quality assurance, the company pursues a zero-defect philosophy.
| Evidence | Witten (Herbede) | Witten (Annen) | Bielefeld | Wilthen |
|---|---|---|---|---|
| Certified service / VTN quality |
History
- 1958
Foundation of the traditional company in heat treatment
- 2015
Acquisition of the VTN Group by IHI Corporation, Tokyo