Cemented carbide roll rings (also known as tungsten carbide roll ring) possesses good thermal conduction property.
At present, the finishing mill is generally composed of 8-10 stands. Because of the big size of fracture surface of rolled part, the collar on the front stands of finishing mill may resist heavy duty and strong impact. Thus, the high hardness and good thermal fatigue resistance are the primary factors, which are prior to wear resistance. While there is low load and impact for the rear stands, we shall pay more attention to the wear-resistance and thermal fatigue resistance of roll rings.
External diameter (mm)
lnner diameter (mm)
Tolerances allowable for the O.D.,I and height of roll rings：
|precision class||External diameter≤200mm|
The allowable deviation of carbide roll rings:
Radial runout of groove ≤0.013mm
Radial runout of periphery≤0.013mm
End face runout≤0.02mm
End face planeness≤0.01mm
End face parallelism≤0.01 mm
Inner hole cylindericity ≤0.01mm
Roughness of carbide rolls:
inner hole roughness 0.4μm
periphery roughness 0.8 μm
end face roughness 0.4μm
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