According to the user's requirements to determine the material of the roll, according to the design requirements of the roll, at present, the forged steel roll material is generally cr2,Cr3,Cr5 and so on. When electroslag casting is adopted, the forging ratio should be higher than 3. The longitudinal section of electroslag remelting ingot is "human" shape crystal, and no white spots are allowed. Internal cracks, shrinkage holes, flaking and non-metallic inclusions visible to the naked eye.