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Gas Nitriding Furnace with Retort

Gas Nitriding Furnace with Retort

Aichelin Unitherm Gas Nitriding furnaces are designed for gas nitriding, gas nitro-carburising, bright annealing and thermal oxidation.

Product details

  • HeatingElectric/ Gas Heated
  • Furnace AtmosphereNH3 + N2 + CO2 / ENDO + H2
  • Gross Capacity 350 to 1500 Kg/batch.
  • ProcessesGas nitriding, Gas nitro-carburising, Bright annealing and Thermal Oxidation.
  • Plant AutomationiFACE, SCADA
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Gas Nitriding Furnace with Retort
Advanced Retort Nitriding for Repeatable and High-Integrity Results

Aichelin Unitherm offers advanced Retort Type Nitriding Furnaces engineered for precision surface hardening through controlled gas nitriding and nitrocarburising processes. Designed for superior metallurgical performance and process reliability, the Aichelin Unitherm Retort Type Nitriding Furnace ensures consistent case depth, uniform hardness, and excellent surface properties across every batch.

The furnace features a horizontally loaded, fully sealed retort design with advanced atmosphere control, optimized gas flow technology and uniform temperature distribution to achieve repeatable and high-quality heat treatment results for demanding industrial applications.

More Technical features

  • Horizontal loading sealed retort furnace design.

  • Sealed Retort made of SS310 / Inconel 800 options available.

  • Electrically heated with heaters and radiant tube located outside retort.

  • Special door design with bayonet locking system for precision sealing.

  • Special shape door seal without joint for effective sealing and safety.

  • NH3 + N2 + CO2 / ENDO + H2 atmosphere for Gas Nitriding and Gas Nitro-carburising.

  • Water / Steam atmosphere for post oxidation / Thermal oxidation.

  • Latest Nitriding potential process control system with H2 / O2 sensors and mass flow meters.

  • Option of automatic Kn control available through recipe program.

  • Temperature uniformity +/- 5°C with thyristor control.

  • Forced rapid cooling for shorter cycle times.

  • Computerized process monitoring and data logging.

Gas Nitriding Furnace with Retort
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Our Service & Support
Reliable service throughout your entire furnace lifecycle

We support our customers throughout the entire lifecycle of their furnaces – from commissioning to ongoing operation, modernization and digital integration.

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Frequently Asked Questions
FAQ – Aichelin Unitherm Gas Nitriding furnace
The furnace is designed for gas nitriding, gas nitro-carburising, bright annealing, and thermal oxidation with precise atmosphere control.
Aichelin Unitherm Gas Nitriding furnace features a horizontal loading sealed retort design, ensuring controlled atmosphere integrity and consistent process conditions.
The retort is available in high-grade SS310 or Inconel 800, ensuring durability and resistance to high-temperature and reactive atmospheres.
The system utilizes NH₃, N₂, CO₂, Endogas, and H₂ for nitriding processes, along with water/steam for post oxidation, supported by advanced sensors and mass flow control.
Yes, it is equipped with the latest nitriding potential (Kn) control system using H₂/O₂ sensors, with an option for fully automatic control via recipe programs.
Depending on the series, batch sizes up to 900 × 1,500 × 1,300 mm and gross loads up to 2,200 kg are possible. Special sizes are designed individually according to customer requirements.
The furnace ensures temperature uniformity within ±5°C, achieved through advanced thyristor-based control systems.
A bayonet locking door system combined with a specially designed joint-free seal ensures precise sealing, enhanced safety, and minimal gas leakage.
How can we support you?

Let’s Discuss Your Heat Treatment Requirements!

We are happy to support you with questions regarding system concepts, processes or services. Our experts provide individual and practical advice.

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