A STUDY OF COMPOSITE HIGH-SPEED STEEL ROLL RING WITH CENTRIFUGAL CASTING

Composite high-speed steel roll ring is studied using centrifugal casting process. The results indicate that the high speed composite roll rings with high hardness, good homogeneity of hardness and excellent inner and outer joint can be obtained by choosing modified high-carbon cobalt-free high speed steel as outer layer and nodular cast iron as inner layer, suitable centrifugal rotating speed and casting span time and temperature of both metal liquids in combination with surface induction heat treatment process. The service life of the roll ring is five times larger than that of high chromium cast iron roll ring in application to industry.