Solution annealing and rapid cooling of work pieces is the purpose of Fog Quenching
Fog quenching is aimed at the treatment of workpieces which are deployed in extremely stressed and / or corrosive environments or processes.
WBT-Electron has a unique opportunity for solution annealing and the rapid cooling of objects which cannot be quenched in water because of their weight or shape. In this way such large and expensive workpieces can undergo the proper treatment.
Solution annealing and rapid cooling is applied to materials which have been welded for example. Using solution annealing the chromium carbides, which are responsible for inter granular corrosion, are being dissolved. Through rapid cooling the excretion of carbides is prevented.
How does Fog Quenching work?
Fog Quenching is executed in the following way:
- The object is heated up to the correct temperature and remains heated for a certain amount of time.
- After this, the object is cooled by an artificial fog created in the furnace.The furnace is equipped with specially arranged shutters which are being opened in order to blow a very large volume of air onto and, if possible, into the workpiece. In the airflow a very fine mist of water is added by means of high pressure.
The fog can be used around as well as inside the workpiece.
Fog Quenching ensures that the large amount of energy produced by the evaporation process is being extracted from the workpiece. This applies to both the inside and outside of the object thus ensuring a rapid and uniform cooling.
By making use of fog quenching the cooling of very large and very heavy objects can be realized in a short amount of time making certain that the required material characteristics are maintained.