Thermal fatigue is the enemy of all roll materials for hot rolling. It causes cracks, which combined with corrosion and abrasive wear, shorten the service life of the pass forms.
As the thermal conductivity of cemented carbide (tungsten carbide (WC)) is twice that of steel or cast iron, it is extremely important that efficient cooling is provided.
The phenomenon of cracking in the roll passform is a fact of life. However, its progress can be checked and poor effects can be minimized if you:
The profitable use of cemented carbide rolls also depends on the training and commitment of the staff involved. Hyperion takes an active part in on-site training in roll maintenance, problem identification and solution suggestions. Contact your Hyperion sales person for help dealing with thermal fatigue.