Hardening
Rotary hearth furnace with hardening press
| Oven temperatures | max 950 °C |
| Heating capacity | 500 kg/h |
| Batch weight | max. 50 kg |
| Batch dimension | 500 x 500 x 150 mm (L x W x H) |
| Heating | Natural gas recuperator burner in the radiant tube |
| Furnace atmosphere | Endogas / nitrogen |
The rotary hearth is loaded or unloaded through a portal on two levels. The components are transferred to the hardening press. Directly after this, the components are linked to the washing machine and finally to the belt tempering furnace with aftercooling section.
Push-through carburizing system
| Oven temperatures | max 980 °C |
| Heating capacity | 1.500 kg/h |
| Batch weight | max. 380 kg |
| Batch dimension | 650 x 650 x 650 mm (L x W x H) |
| Heating | Natural gas recuperator burner in the radiant tube |
| Furnace atmosphere | Endogas / nitrogen |
| Carburizing capacity | at 0.2 mm -> 1,500 kg/h at 0.8 mm -> 700 kg/h at 1.2 mm -> 350 kg/h |
Furnace system consists of the following assemblies:
- Transport line with loading & unloading
- Pre-oxidation furnace
- Gas carburizing furnace
- Oil quenching bath
- Washing machine
- Tempering furnace
Puncture hardening system
| Oven temperatures | max 930 °C |
| Heating capacity | 100 kg/h |
| Batch weight | max. 25 kg |
| Batch dimension | 300 x 300 x 300 mm (L x W x H) |
| Heating | Indirect electric heating |
| Furnace atmosphere | Ammonia |
The furnace system consists of the following assemblies:
- Loading
- Vacuum lock
- High temperature furnace with ammonia splitter
- Oil bath
- Unloading
Cast plate belt furnace
| Oven temperatures | max 960 °C |
| Heating capacity | 1.100 kg/h |
| max. belt load | 152 kg/m² |
| Part weight | 2 - 2.500 g |
| Throughput width annealing furnace | 1.200 mm |
| Throughput width tempering furnace | 1.400 mm |
| Heating | Natural gas recuperative burner in the radiant tube |
| Oven atmosphere | Endogas / Nitrogen |
The cast link conveyor is overlapped and manufactured in 1.4849. The furnace is equipped with lightweight refractory brick and ceramic fiber insulation and has space for 2 atmosphere circulation units.
N2 safety gassing
3 inlet photocells to control the loading height (CQI-9)
Reversing – synchronous drive system with torque control
Activation furnace
| Oven temperatures | max. 500 °C |
| Heating capacity | 250 kg/h |
| Batch size | 800 x 700 x 400 mm (L x W x H) |
| Heating | Direct electric heating |
| Process gas | Ammonia |
| Process fluid | Tetrachloroethene |
| Safety purge gas | Nitrogen |
The activation plant is used to remove the passivating metal oxide layer from stainless steel workpieces. This is necessary in order to be able to carry out a nitriding process and obtain a hard surface. Depending on the shape and size of the workpieces, they are brought into the treatment room in baskets or charging racks.
Roller hearth furnace
| Oven temperatures | max. 900 °C |
| Heating capacity | 100 kg/h |
| Batch weight | 5 kg |
| Batch dimension | 300 x 300 x 50 mm (L x W x H) |
| Heating | Indirect electric heating |
| Furnace atmosphere | Nitrogen / Methanol |
The gas-tight furnace has a hot gas circulator, a methanol splitter and a gas supply panel for propane, air, nitrogen and methanol.
The furnace has a heated furnace length of 3000 mm with a door at the inlet and outlet. The oil bath is equipped with a lowerable roller conveyor which feeds the charges to the downstream washing process.
Austenitizing furnace with hardening press
| Oven temperatures | max. 900 °C |
| Heating capacity | 100 kg/h |
| Batch weight | 8 kg |
| Batch dimension | 240 x 240 x 50 mm (L x W x H) |
| Heating | Indirect electric heating |
| Furnace atmosphere | Nitrogen / Methanol |
The furnace system consists of:
- Loading
- Roller hearth furnace
- Hardening press
- Unloading
The furnace has a hot gas circulator, a methanol splitter and a gassing panel for propane and air, nitrogen and methanol. The furnace has a heated furnace length of 3000 mm with one door each at the inlet and outlet.
Roller hearth furnace for bainitizing
| Oven temperatures | max. 930 °C (austenitizing furnace) |
| Throughput capacity | up to 600 kg/h |
| Batch weight | 50 kg bulk material in annealing baskets |
| Batch size | 750 x 750 x 150 mm |
| Heating | Natural gas recuperative burner in radiant tube |
| C-level | 0,1 - 0,8 |
| Atmosphere | Nitrogen / methanol |
| Quenching & removal from storage | max. 400 °C under salt |
| Heating | Electric heater |
The austenitizing furnace is part of a fully automated heat treatment plant with upstream & downstream processes, such as loading & unloading, pre & salt washing, and drying and weighing. The furnace is equipped with an inlet lock and is directly connected to the salt quench bath.
Rollenherdofen für die Schmiedeindustrie
| Oven temperatures | max 920 °C (annealing) max 600 °C (ageing) |
| Heating capacity | 6,000 kg/h |
| Batch weight | max. 350 kg |
| Throughput width HTO | 1,200 mm |
| Throughput width NTO | 2,400 mm |
| Heating | Direct natural gas recuperative burner |
The plant is used for quenching and tempering of steel plates at a working temperature HTO of 870°C to max. 920°C, quenching with water and subsequent stress-relieving annealing at a working temperature NTO of 250°C to max. 500°C.
The parts pass through the furnace system in a charge length of max. 1600 mm and a weight of max. 350 kg. In the process, they pass through the following plant components:
- Loading
- Austenitizing furnace
- Water quenching bath
- Cross transfer car
- Tempering furnace
- Aftercooling station
- Unloading