Heat treatment of steel and metallic workpieces up to 50 t unit weight at four heat treatment centers in Germany.
HÄRTEREI REESE
Bochum (44807) · Brackenheim (74336) · Chemnitz · WeimarNew on Amplifa
Experts in heat treatment since 1948
HÄRTEREI REESE is an owner-managed family business with four heat treatment centers in Bochum, Brackenheim, Chemnitz and Weimar. Founded in 1948 by Dr.-Ing. Helmut Reese, the company with around 240 employees performs heat treatment and finishing processes for steel and other metallic materials. The range of processes includes hardening and tempering, case hardening, low pressure carburizing, surface layer hardening (induction, flame, laser), vacuum hardening, gas and plasma nitriding, nitrocarburizing, annealing as well as straightening and surface treatment. With more than 200 heat treatment installations, large components up to Ø 5.000 mm and 50 t unit weight are treated just like small parts in series production. Customers come from mechanical engineering, plant engineering, wind power, offshore, shipbuilding, automotive supply, toolmaking and gear technology. The offering is complemented by design and manufacturing consulting, a metallographic laboratory, testing and documentation, as well as its own pickup and delivery service (HÄRTEREI-EXPRESS).
- Site
- Brackenheim
- Processes
- Hardening and tempering, Case hardening, Carbonitriding, Low Pressure Carburizing / low-pressure carburizing, Surface layer hardening (induction and flame hardening), Spin hardening, Single tooth hardening, Laser hardening
- Materials
- Steel, Low-alloy case hardening steels, High-alloy steels, Powder-metallurgically produced steels, Iron-based alloys, Nitriding steels, Carbon and carbon-manganese steels, Alloyed steels
- Certificates
- ISO 9001:2015, ISO 14001:2015, ISO 50001:2018, Bureau Veritas Recognition (BV Mode II Scheme), DNV Approval of Manufacturer (Heat Treatment), ISO 9001 IQNET (Bochum), IATF 16949 (Brackenheim, Chemnitz, Weimar), EMAS (Chemnitz, Weimar), American Bureau of Shipping (Bochum), ISO 9001, ISO 14001, ISO 50001, IATF 16949, EMAS, DNV/BV/ABS (shipbuilding/offshore)
- Founded
- 1948
- Employees
- 240
- Industries
- Mechanical engineering, Plant engineering / large-scale plant engineering, Wind power, Offshore, Shipbuilding, Automotive (suppliers)
- 01
Consulting (material and process selection)
- 02
Pickup/delivery service (HÄRTEREI-EXPRESS)
- 03
Heat treatment (hardening, tempering, nitriding, annealing)
- 04
Surface treatment (blasting, browning, oxidizing)
- 05
Straightening
- 06
Testing and documentation (metallographic laboratory)
- 07
Logistics/freight forwarding service
Materials and processes
Steel (alloyed and unalloyed)
Base material for all hardening, tempering and nitriding processes, also in large dimensions up to 50 t.
Nitriding steels (DIN 17211 / EN 10085)
For gas, plasma and vacuum nitriding with high surface hardness and wear resistance.
Low-alloy case hardening steels
Case hardening, carbonitriding and low-pressure carburizing for wear-resistant surface layers.
Powder-metallurgically produced steels
For low-pressure carburizing with high dimensional accuracy and low distortion tendency.
High-alloy steels
Heat treatment for demanding corrosion and wear applications.
Carbon and carbon-manganese steels
Covered by the DNV approval for shipbuilding and plant engineering components.
Cast components (special annealing)
Special annealing processes for cast components for microstructure conditioning and stress relief.
Four locations – one philosophy
Bochum
DEHeadquarters plant (founded 1948), nitriding of large components, vacuum hardening, surface layer hardening
- Part weight / size
- up to 50 t unit weight, Ø 5.000 x 5.000 mm (pit furnace), Ø
- Lot size
- Single parts to series
- Materials
- Steel, nitriding steels, alloyed steels
- Pit furnace system (protective gas hardening, Ø 5.000 x 5.000 mm, max. 50 t)
- Multi-purpose chamber furnace lines (1.200 x 900 x 960 mm)
- Nitriding systems (plasma, gas, vacuum, Ø 2.900 x 5.500 mm)
- Induction, flame and laser hardening systems
- Process-controlled vacuum furnaces (gas quenching up to 20 bar)
- Precision straightening presses (up to 8.000 kN, 10.000 mm)
- Blasting systems (up to Ø 4.500 x 10.000 mm)
Brackenheim
DELocation since 1988, new heat treatment center on 5.000 m² of production space
- Part weight / size
- Ø 1.500 x 4.500 mm (pit furnace), 1.200 x 900 x 1.200 mm
- Lot size
- Series (IATF 16949)
- Materials
- Steel, alloyed steels
- Plasma nitriding systems (pulsed plasma, Ø 1.500 x 3.400 mm)
- Pit furnace systems
- Chamber furnace lines
- Straightening presses (Ø 150 x 3.000 mm)
Chemnitz
DELocation since 1991, focus on low-pressure carburizing and laser hardening
- Part weight / size
- 1.000 x 600 x 700 mm, max. 750 kg charge weight (LPC)
- Lot size
- Small to large series
- Materials
- Low-alloy case hardening steels, high-alloy and powder-metallurgical steels
- Fully automated low-pressure carburizing systems (oil and pressure gas quenching)
- Laser hardening systems (1.500 x 600 x 800 mm)
- Pit furnace systems (Ø 2.000 x 4.500 mm)
- Chamber furnace lines
Weimar
DELocation since 1992, nitrocarburizing and series heat treatment
- Part weight / size
- Ø 1.500 x 2.000 mm (pit furnace), 1.200 x 900 x 950 mm
- Lot size
- Small to large series
- Materials
- Steel, ferrous materials
- Gas nitriding/nitrocarburizing systems (chamber furnace 1.800 x 1.200 x 1.000 mm)
- Pit furnace systems
- Chamber furnace lines
- Straightening presses
Typical components
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Hardening and temperingHeat treatment | – | 5.000 mm × Ø 5.000 mm | – | – | Steel, other metallic materials |
| Case hardeningHeat treatment | – | 5.000 mm × Ø 5.000 mm | 50 t unit weight | – | Steel, low-alloy steels (carbonitriding) |
| CarbonitridingHeat treatment | – | 5.000 mm × Ø 5.000 mm | – | – | low-alloy steels |
| Low Pressure Carburizing / low-pressure carburizingHeat treatment | finest tolerances | 750 mm × 1.000 mm × 600 mm | 750 kg charge weight | – | low-alloy case hardening steels, high-alloy steels, powder-metallurgically produced steels, iron-based alloys |
| Surface layer hardening (induction and flame hardening)Heat treatment | – | 12.000 mm × Ø 1.000 mm | 16 t | – | Steel |
| Spin hardeningHeat treatment | – | Ø 1.650 mm | – | – | Steel |
| Single tooth hardeningHeat treatment | – | Ø 5.500 mm | – | – | Steel |
| Laser hardeningHeat treatment | – | 800 mm × 1.500 mm × 600 mm | – | – | Steel |
| Vacuum hardeningHeat treatment | – | 1.200 mm × 1.800 mm × 1.000 mm | – | – | Steel, low-alloy steels |
| Nitriding (plasma, gas and vacuum, passivating)Heat treatment | – | 5.500 mm × Ø 2.900 mm | – | – | ferrous materials, nitriding steels (DIN 17211 / EN 10085) |
| Nitrocarburizing (plasma and gas nitrocarburizing)Heat treatment | – | 5.500 mm × Ø 2.900 mm | – | – | ferrous materials, Steel |
| Plasma nitriding (pulsed plasma)Heat treatment | – | 3.400 mm × Ø 1.500 mm | – | – | Steel |
| StraighteningHeat treatment | up to 0.1 mm | 10.000 mm | – | – | Steel |
| Annealing (normalizing, diffusion annealing, stress-relief annealing, recrystallization annealing,Heat treatment | – | 5.000 mm × Ø 5.000 mm | – | – | metallic materials, cast components |
| Surface treatment (cleaning blasting, browning, Blackrapid®, oxidizing, steam degreasing,Surface | – | Ø 2.500 mm × 2.500 mm | – | – | Metal |
| TemperingHeat treatment | – | 5.000 mm × Ø 5.000 mm | – | – | Steel |
| Consulting (design and manufacturing consulting, material and process selection)Engineering | – | – | – | – | steels, metallic materials |
| Testing and documentation (hardness testing, metallography laboratory, failure analysis)Testing | – | – | – | – | metal components |
11 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Pit furnace system (protective gas hardening) | – | – | Ø 5.000 mm x 5.000 mm, max. 50 t unit weight | – | Bochum |
| Multi-purpose chamber furnace lines (automatically loaded/unloaded) | – | – | inter alia 1.200 x 900 x 960 mm | – | Group |
| Fully automated low-pressure carburizing systems (oil and pressure gas quenching) | – | – | 1.000 x 600 x 750 mm (gas quenching 660 mm height), max. 750 kg | – | Chemnitz |
| Induction, flame and laser hardening systems | – | – | up to 16 t weight, 12 m length | – | Group |
| Process-controlled vacuum furnaces (gas quenching up to 20 bar) | – | – | up to 1.800 x 1.000 x 1.000 mm | – | Group |
| Nitriding systems (plasma, gas, vacuum) | – | – | Ø 2.900 x 5.500 mm | – | Bochum |
| Plasma nitriding systems (pulsed plasma) | – | – | Ø 1.500 x 3.400 mm | – | Brackenheim |
| Precision straightening presses | – | – | max. press force 8.000 kN (800 t), max. workpiece length 10.000 mm | – | Group |
| Protective gas system | – | – | – | – | Bochum |
| Blasting systems | – | – | up to Ø 4.500 x 10.000 mm | – | Group |
| Heat treatment installations total | – | über 200 | – | – | Bochum, Brackenheim, Chemnitz, Weimar |
Additional services
Quality and certification
Hardness testing is performed in the company's own metallographic laboratory with documented results and failure analysis. All four locations are certified to ISO 9001; Bochum is additionally recognized by Bureau Veritas, DNV and the American Bureau of Shipping for the heat treatment of shipbuilding and offshore components.
| Evidence | Bochum | Brackenheim | Chemnitz | Weimar |
|---|---|---|---|---|
| ISO 9001 | ||||
| ISO 14001 | ||||
| ISO 50001 | ||||
| IATF 16949 | ||||
| EMAS | ||||
| DNV/BV/ABS (shipbuilding/offshore) |
History
- 1948
Founded by Dr.-Ing. Helmut Reese in Bochum
- 1988
Establishment of the Brackenheim location
- 1991
Establishment of the Chemnitz location
- 1992
Establishment of the Weimar location
- 1999
Härterei Reese Bochum as the first German heat treatment plant with Eco-Audit according to DIN EN ISO 14001
- 2001
Weimar location: first EMAS environmental management system of a heat treatment plant in the new federal states