In our previous discussion on roll selection for rolling mills, we introduced ICDP, SGP, SGI, and HSS rolls. Now, let’s explore four more crucial types: CC Rolls, HCr Rolls, AD Rolls, and GS Rolls.

CC Rolls (Composite Cast Rolls)

CC Rolls are made through a composite casting process. Their outer layer, composed of high - grade wear - resistant material like high - chromium iron, withstands abrasion, while the inner core provides strength.

This structure gives CC Rolls excellent wear and thermal fatigue resistance. In hot strip rolling mills' intermediate stands, they maintain performance under high temperatures and heavy forces, reducing roll changes and boosting efficiency.

HCr Rolls (High Chromium Rolls)

HCr Rolls are characterized by 12% - 30% chromium content, which enhances hardness, wear, and corrosion resistance. Their hard surface layer (up to 65 - 70 HRC) ensures smooth rolling, making them ideal for high - quality products. In cold rolling mills, they guarantee precise thickness and finish; in hot rolling finishing stands, their oxidation resistance helps achieve product accuracy.

AD Rolls (Alloyed Ductile Iron Rolls)

AD Rolls integrate alloying elements like nickel, molybdenum, and copper into ductile iron, improving strength, toughness, and wear resistance. They are suitable for various rolling applications, adapting well to different loads and temperatures. In medium - sized mills, they improve quality and reduce replacement costs.

GS Rolls (Graphite Steel Rolls)

GS Rolls have graphite dispersed in the steel matrix, acting as a lubricant to reduce friction and energy consumption. Their good thermal conductivity dissipates heat effectively during hot rolling, preventing damage in roughing stands and improving process stability.

In conclusion, understanding these four rolls' features and applications is crucial for rolling mill operators. Informed decisions optimize mill performance, enhance product quality, and offer a competitive edge in the metal processing industry.