Your browser does not support JavaScript! Low Pressure Carburizing in new vacuum pit furnace by SECO/WARWICK


How to carburize
thick layers in a vacuum
pit furnace?

1. Collect the parts which you want to carburize on a given layer thickness

  • Thoroughly clean the parts and remove any residues left after machining.
  • Estimate the surface area of your parts with the help SECO/WARWICK’s user-friendly software.
  • Place the parts on a dedicated fixture, make sure that the fixture is ready to withstand elevated temperatures.

2. Prepare your furnace

  • Make sure that the furnace has been well maintained in accordance with the instruction manual.
  • Check if the utilities are connected and available (you do not need endogenerator for this process, acetylene-based mixture is enough).
  • Choose a proper recipe, vacuum carburizing can help you in gaining remarkable savings on process time.
  • The furnace does not need to be conditioned, you can start your vacuum pit furnace on demand, when you need it.

3. Load the fixture with the parts

  • Open the furnace (mind the temperature if the furnace is opened in hot conditions).
  • Use the overhead crane to load the fixture with the parts into the furnace (it can be realized in an automated mode).
  • Close the furnace.

4. Start the process

  • Start the process using built-in HMI on the furnace’s control cabinet or use a remote control station of SCADA system.
  • Control system of the vacuum pit furnace allows to keep thousands of recipes in database with immediate access.

5. Observe and control the furnace and the process

  • Furnace operation during heat treatment process is fully automatic and kept in line by state-of-the-art PLC with fail-safe feature.
  • Even though, it is wise to control the furnace operation periodically, either using the HMI on the control cabinet or remote access (even from your mobile devices).
  • Preventive maintenance features will give you insight in every key sub-assembly of the furnace.
  • Possibility of data storage in the cloud gives you limitless possibilities of archiving your files and keeping them safe.

6. Open the furnace and quench* the parts

  • Open the furnace (caution: 1050°C is really hot).
  • Yes, we are talking about opening a vacuum furnace with low pressure carburizing in hot conditions, it is possible.
  • Use the overhead crane to lift the fixture with the parts (it can be realized in an automated mode) and place them in a quenching bath
    *if you do not want to quench the parts you can cool them down with the furnace using its internal cooling system.
  • Load the next batch or shut down the furnace (you do not need the keep it on the temperature if it is not used).

7. Wash the parts

  • After the quenching process, place the fixture with the parts in a washing machine.

8. Check the results of the process

  • Check if the obtained results correspond with your requirements.
  • Admire uniform effective case depth [ECD] and the fact that there is no intergranular oxidation [IGO] in your parts.
  • Calculate your savings gained in comparison with traditional atmosphere pit carburizing furnace.

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