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vacuum hardeningmagnifier

During vacuum hardening, material is heated in the absence of oxygen by convection in the medium of inert gas (N₂) and / or heat radiation in the underpressure. Steel is hardened with a stream of nitrogen, whereby cooling rate can be determined by selecting the excess pressure. Depending on the workpiece shape it is possible also to choose the direction and time of nitrogen blowing. Optimization of time and steel temperature control are carried out during process with the use of pilot thermocouples which can be placed on a workpiece in the heating chamber. Steel that is heat treated in a vacuum furnace obtains the specified properties of strength and hardness throughout the entire cross-section, without surface decarburization. Austenitic grain is fine and it complies with international standards.

VACUUM HARDENING, ANNEALING, NORMALIZATION, TEMPERING (up to 1300 °C)

Maximum workpiece dimensions Maximum workpiece weight Medium (surrounding substance)
600 x 600 x 900 800 kg N

Advantages:

  • Modern computer-controlled process regulation which ensures a high level of repeatability,
  • Steel is not carborized or decarburised,
  • Dimensional changes are minimal,
  • Optimal times of process,
  • Flexibility,
  • Decorative effect (clean and bright surface),
  • Environmentally friendly process.

Applications:

  • Hot- and cold-work tool steel products,
  • Tools for plastics,
  • Forging tools,
  • Cutting tools,
  • Die casting tools,
  • Pressing tools,
  • Cylinders, pistons, industrial knives,
  • High-speed steel products (drills, milling cutters, etc.).
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