Ferritic cast iron roll

The roughing mill rolls require a combination of certain characteristics, some of which can be offset by other characteristics. These properties include wear resistance, resistance to cracking and impact, thermal hardness, and thermal strength. Excessive network carbides can improve wear resistance and impact resistance, but significantly reduce fracture toughness. During the rough rolling process, they can promote the formation of fire cracks and be added to the bainite/martensite (needle like) matrix, which is more wear-resistant than traditional pearlite matrix. Molybdenum can also increase the thermal hardness of rolling mills. This type of rolling mill is made of high alloy material that has undergone special heat treatment. The carbide content in the matrix is less than 5%, which meets the requirements of the roughing mill.

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