Hardening

Rotary hearth furnace with hardening press

Oven temperaturesmax 950 °C
Heating capacity500 kg/h
Batch weightmax. 50 kg
Batch dimension500 x 500 x 150 mm (L x W x H)
HeatingNatural gas recuperator burner in the radiant tube
Furnace atmosphereEndogas / 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 temperaturesmax 980 °C
Heating capacity1.500 kg/h
Batch weightmax. 380 kg
Batch dimension650 x 650 x 650 mm (L x W x H)
HeatingNatural gas recuperator burner in the radiant tube
Furnace atmosphereEndogas / nitrogen
Carburizing capacityat 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 temperaturesmax 930 °C
Heating capacity100 kg/h
Batch weightmax. 25 kg
Batch dimension300 x 300 x 300 mm (L x W x H)
HeatingIndirect electric heating
Furnace atmosphereAmmonia

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 temperaturesmax 960 °C
Heating capacity1.100 kg/h
max. belt load152 kg/m²
Part weight2 - 2.500 g
Throughput width annealing furnace1.200 mm
Throughput width tempering furnace1.400 mm
HeatingNatural gas recuperative burner in the radiant tube
Oven atmosphereEndogas / 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 temperaturesmax. 500 °C
Heating capacity250 kg/h
Batch size800 x 700 x 400 mm (L x W x H)
HeatingDirect electric heating
Process gasAmmonia
Process fluidTetrachloroethene
Safety purge gasNitrogen

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 temperaturesmax. 900 °C
Heating capacity100 kg/h
Batch weight5 kg
Batch dimension300 x 300 x 50 mm (L x W x H)
HeatingIndirect electric heating
Furnace atmosphereNitrogen / 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 temperaturesmax. 900 °C
Heating capacity100 kg/h
Batch weight8 kg
Batch dimension240 x 240 x 50 mm (L x W x H)
HeatingIndirect electric heating
Furnace atmosphereNitrogen / 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 temperaturesmax. 930 °C (austenitizing furnace)
Throughput capacityup to 600 kg/h
Batch weight50 kg bulk material in annealing baskets
Batch size750 x 750 x 150 mm
HeatingNatural gas recuperative burner in radiant tube
C-level0,1 - 0,8
AtmosphereNitrogen / methanol
Quenching & removal from storagemax. 400 °C under salt
HeatingElectric 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 temperaturesmax 920 °C (annealing)
max 600 °C (ageing)
Heating capacity6,000 kg/h
Batch weightmax. 350 kg
Throughput width HTO1,200 mm
Throughput width NTO2,400 mm
HeatingDirect 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