Of key importance, while hardening Carburised steel to a defined structural constitution, is the precise control of the cooling times and cooling rates. The exact knowledge of the austenite transformation is thereby of great importance. Only with this knowledge is it possible to achieve reproducible characteristic modifications by a direct thermal treatment.
The increased quality demands of your customers more often require you to guarantee (documented) complete or partial removal of the residual austenite. This can be only achieved by a defined cooling within the very low-temperature area. The control of this process and the control of continuous product quality are only possible with a closed chamber, in which the temperature is electronically regulated and reproducible.
Principle of function
The cooling is obtained by gasification of liquid nitrogen (LN2) in a closed chamber. The basket with the load is cooled vertically from the bottom upward.
Single machine in a vacuum line at MAN Augsburg
USA at ALD TT
North France, SKF Aeroengines