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Ionitechs Cold-Wall plasma nitriding and low temperature nitrocarburising equipment

The heating of the parts, in a Cold-Wall plasma nitriding installation, is carried out only by pulsed plasma created in the vacuum chamber. This type of plasma nitriding equipment is especially suitable for nitriding similar in shape and size batches of parts. The main advantages of this type of equipment are:

-    Lower cost of the equipment
-    Easy maintenance
-    Lower consumption of electrical energy

The Cold-Wall vacuum chambers type could be:

-    Door-type chambers
-    Bell-type chambers
-    Pit-type chambers
-    Combined chambers loaded from the bottom and from the top

Vacuum chambers have double walls, with cooling water circulating in between. In order to decrease the heat exchange between treated parts and the chamber walls, two stainless steel shields, separated by thermo-insulating wadding, are installed on the inside surface of the walls and the bottom.

In the door-type chambers and bell-type chambers, the parts are loaded on a metal plate. In the pit-type chambers the parts are attached
to special devices to hang. And for the combined-type chambers, the parts could be loaded on a working plate or attached to devices to hang.  The metal plate and the special devices for attachment lie on support insulators and are connected to the cathode of the plasma generator. The process of plasma nitriding could be viewed through a sight glass. The temperature during the process is measured directly in the parts using one or two thermocouples K-type.

The plasma generator and its defense mechanism - a power transformer, a three phase thyristor rectifier, a power choke, a power IGBT switch and a number of circuit breakers, filters and contactors, assembled for different supply voltages and mains frequencies. They are mounted in metal cabinet IP 54 that is cooled with and air conditioning.
The gas vacuum system evacuates the chambers and fills them with treatment gases. It includes a vacuum pump, electro-pneumatic and electromagnetic valves, reducing valves with filters and manometers, mass flow controllers, gas mixer, manual valves, two absolute pressure gauges and vacuum connections.

The pressure gauges are mounted on the chambers bodies. The rest of the components are placed in a ventilated metal enclosure IP54. The process is carried out with a mixture of hydrogen and nitrogen. Propane or natural gas are used for nitrocarburising. After the end of the treatment, the chambers can be filled with argon for accelerated cooling. Pressed air is us The control system consists of an PC controller, main system controller and subsystems (transmitters and drivers) that are connected in communication network. The PC controller is a 15 touchscreen display and uses Windows Embedded Standard 7 software.
The technological process is completely automatic. All of the main and parameters are controlled by the system controller:

-    Pressure in the working chamber
-    Temperature of the processed parts
-    Heating speed
-    Ratio and consumption of working gases
-    Process time length
-    Pulsed current
-    Frequency of pulses
-    Duty-cycle
-    Temperature of cooling water

The whole process could be controlled through a user-friendly software called IonView. It has the following capabilities:

-    Review and editing of the technological process programs
-    Possibility of editing the technological programs during the plasma nitriding process
-    Contains an archive of past processes
-    Signal for malfunctions and errors in the installation
-    Remote access to the archive of processes.

Ionitech Ltd. offers the biggest variety of Cold-Wall type of plasma nitriding installations in the world. 

Installation, model

Working volume, mm, Ø x h

Vacuum chamber type

Max. weight of loaded parts, kg

ION-20I

500 600

Door-type

200

ION-25I

500 600

Door-type

300

ION-40I

750 750

Bell-type

600

ION-50I

750 900
750 1200

Bell-type
Bell-type

1000
1000

ION-75I

750 1800
1000 1000

Pit-type/Combined
Bell-type

1500
1500

ION-100I

750 3000
1000 1500
1000 2000
1300 1300

Pit-type
Bell-type
Bell-type
Bell-type

2000
2500
2500
2500

ION-150I

750 5000
1300 1800
1600 1600

Pit-type
Bell-type
Bell-type

2500
3000
3000

ION-200I

1000 5000
2000 1000

Pit-type
Bell-type

3500
4000

ION-300I

2500 1500

Bell-type

5000

-    Input voltage: 3/380V( 480V ) +10%/-15%, 50Hz ( 60 Hz )
-    All installation models could be equipped with two chambers working separately
-    Working gases: ammonia, nitrogen, hydrogen, propane, methane
-    Cooling gases: nitrogen, argon
-    Working pressure: 1-8 mbar
-    Time for manufacturing 4 6 months (depending on the model).

For information about our installations type HWI -" hot walls", please, >> Click here <<

   
 

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