A gas quenching cell is a mechanism under pressure, which allows a load to be cooled at different speeds and pressures (up to 20 bar absolute). This cell was designed to quench either with nitrogen or helium with remarkable cooling efficiency and uniformity. Gas cooling is performed with two water/gas heat exchangers located on each side of the load. The water flow and temperature determine the exchanger cooling power and thus the load’s cooling rate. The gas flow is performed by two mixed-flow turbines, located on either side of the load. The large diameter design of these turbines is crucial to optimise the gas velocity and the power of the engines.
Gas flow from bottom to top mode
Alternating gas flow
Gas direction is variable - either from top to bottom or bottom to top - thanks to an ingenious system of lateral shells moving with a set of 2 cylinders in less than1 second.
The advantage of this alternating flow is to offer the possibility to reduce the thermal gradients between the top and bottom of the load, and therefore, improving the hardness tolerance and distortion. The programming of this alternating flow is specific to each recipe.