Study on Roll of in-situ Synthesized Particulates Reinforced Ferrous Matrix Composites

The usual alloy cast iron roll has low hardness and poor abrasion resistance,but the hard alloy roll with good abrasion resistance has high production cost and large brittleness,so an in-situ synthesized particulate reinforced ferrous matrix composites roll having high abrasion resistance was developed by means of centrifugal casting technique.The main problems for producing ferrous matrix composites roll,such as segregation and crackle,were solved.Its hardness is 66~68HRC and the hardness balance on the roll surface is smaller than 2HRC,its impact toughness is over 18 J/cm².Used in the pre-presision rolling machine group of high speed wire rod mill,the developed roll has 8~10 times longer service life than that of alloy cast iron roll,nears hard alloy roll.