GASoFORM quenching system

Parts are evenly heated in ROLLMOD hearths and transported individually via a photoelectric-sensor controlled speed conveyor into a special quenching form. Here, they are cooled on all sides by gas emitted from the nozzle panels. The process is automatically and very flexibly controlled by a process-control unit, e.g. for martensite, bainite or hot-bath hardening.

Precision cooling with minimum warping

Cooling is effected with great precision and reproducibility according to Newton’s law. Air or nitrogen is applied through the panel of nozzles at a pressure of 150 mbar to achieve α values of 1000 W/m²K, which is approximately the equivalent of the quenching intensity of oil. The cooling of plates and cylinders may be compared to the equivalent distance J on the Jominy sample.

The even application of heat on all sides prevents tension being created within the piece, which in turn means that practically no warping occurs.

Particularly economical

The overall costs for hardening series-produced components are considerably lower than those incurred with conventional oil hardening:

• The quenching system is very compact and therefore only has a small footprint.
• Oil is not used and so doesn’t have to be disposed of.
• It is also not necessary to clean parts after quenching.
• The costs for the individual tools are considerably lower than those for fixture hardening.
• The changing times for the quenching forms may be considerably reduced.

Safety and environmental protection

These systems may be easily integrated into production lines due to the fact that there is no risk of fire and no residues left over from hardening (oil, salt) need to be disposed of.