New SOLO Swiss controlled atmosphere heat treatment line for the aeronautical industry

SOLO Swiss, a company producing controlled atmosphere industrial furnaces, has commissioned a new large-scale automatic heat treatment line for the aeronautical industry in Asia.

 Soloswiss P800

This SOLO Swiss heat treatment line, specifically designed for large aeronautical component annealing and carburization, comprises a bell-type austenitizing furnace, an oil quenching tank, a salt quenching tank, a gas cooling tank, two washers (for post oil-quenching and post salt-quenching washing), two nitrogen temper furnaces, a motor-driven handling device and an Axron Swiss Technology process control and monitoring system (

This facility is able to accommodate round loads of up to 900 mm in diameter and 1500 mm high weighing up to 650 kg.  Soloswiss P800 pièces


The different modules

a.     Main furnace

This electrically-heated, mobile vertical austenitizing bell-furnace, operating at temperatures of up to 1000°C, is designed for overhead transfer to the oil and salt quenching and gas-cooling tanks. A turbine is located on the top of the furnace, a gas feed system inside the bell and there is a cooling fan providing a temperature uniformity within +/- 5°C and extremely fast atmosphere control.

b.     Oil quenching tank

The tank has an oil capacity of 15 700 litres, heating up to a maximum temperature of 150°C; it is fitted with a removable oil-protection cover, an oil cooling system controlled by an oil -to-air heat exchanger and a pump, a variable-speed mixer providing optimum flow, an oil level detector and an internal tank load detector.

c.     Salt quenching tank

This tank has a salt capacity of 12 800 litres, heating up to a maximum temperature of 450°C; it is fitted with a removable stainless steel protection cover, an air-flow cooling system, a variable-speed mixer providing optimum flow, a salt-level detector, an automatic level regulator and an internal tank load detector.

d.     Gas tank

The gas tank has a capacity of 2 500 litres. It is fitted with a sealed removable cover and a slow cooling vessel that is nitrogen-protected following carburization, an air-flow feed system, an internal heat exchanger and a load detector.

e.     Extractor hood

Fitted on top of the facility, the extractor traps fumes.

f.      Oil washer

The stainless steel washer provides an alkaline wash of parts that have been oil-quenched. It comprises two tanks, a sprinkler system with directional splash rails and tank heaters.

g.     Salt washer

This stainless steel washer provides a neutral wash of parts that have been salt-quenched. It comprises two tanks, a sprinkler system with directional splash rails and tank heaters.

h.     High temperature tempering furnaces

These fixed tempering furnaces, which can reach a temperature of 750°C, are fitted with turbines and cooling fans ensuring excellent temperature uniformity.

i.       Handling device

This device comprises a guide rail with lifting tackle to enable loading, unloading and handling of loads along the entire line. Fine positioning is provided by a LASER system.

j.      AXRON SWISS TECHNOLOGY  control and monitoring system

The intuitive, multi-lingual (F, D, GB, I, SP, CZ, Chinese, Japanese) graphic interface is easy to use and user-friendly. Flow chart of all control components to facilitate tracking. Can be linked to a central ERP system. Can be remote-controlled via Internet. Profinet network between PLC and Monitoring system. On-line carburization depth simulation and calculation. Soloswiss P800 image écran


This line offers the following advantages:

–        It is modular; it can perform multiple heat treatment cycles.
–        The individual modular structure allows system optimisation at any moment – production can be increased by simply adding extra modules.
–        Load storage capacity for optimum production planning.
–        Controlled-atmosphere furnace.
–        Extremely fast transfer between furnace and quenching tank.
–        Aeronautical specifications AMS2750D Instrumentation Type C.

 SOLO has been manufacturing industrial furnaces for heat treatment of metals since 1945. SOLO designs both batch controlled-atmosphere furnaces, bell-type furnaces, retort furnaces, muffle furnaces, temper furnaces, and continuous process furnaces, mesh belt furnaces with online quenching to cover a wide variety of heat treatment processes (carburization, accelerated carburization, hardening, annealing, tempering, brazing, carbonitriding, nitriding, etc.)

SOLO Swiss Group
Public affairs

SOLO Swiss manufactures advanced industrial furnaces for the heat treatment of metals. SOLO Swiss offers atmosphere furnaces, batch furnaces, bell-type furnaces, continuous furnaces, mesh belt furnaces used in variety of heat treatment processes: carburizing, hardening, tempering, annealing, austempering, nitriding, brazing, carbonitriding, sintering, nitrocarburising, oxinitriding, quenching.

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Posted in Industrial furnaces

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SOLO Swiss Atmosphere Furnace
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