CENTRIFUGAL LINING OF LARGE CAST IRON BEARING SHELLS WITH ALLOY SOS 6-6.

Clad bimetal bearing shells used in crushing machines in the cement industry wear rapidly and need frequent relining. A novel centrifugal casting process has been developed in Vietnam to raise the quality of the shells and economize on scarce metals. The centrifugal pouring of bearing shell linings requires the use of electrospark surface preparation and alloy SOS 6-6 alloyed with cadmium. Dynamic control of the solidification process and initial rapid quenching of the rotating mold ensure good anti-friction properties and high bonding strength.