Forging Back up Roll for Sheet and Strip Coil Rolling Mill

Introduction:
Back up rolls are important spare parts in rolling mill. The quality of forging rolls directly affects the quality of sheets & coils. By our years of experience, we can supply good quality forging roll with uniformity hardness, premium wear resistance and anti-thermal crack performance. 
1. No macroscopic segregation and few microscopic segregations.
2. Very few and subtle non-metal inclusion; dispersed distribution.
3. Compact and homogeneous structure.
4. High toughness and strength
5. Beneficial for improvement of anti-fatigue and heat impact ability of the roll.

Forging Back up Roll for Sheet and Strip Coil Rolling Mill

Manufacturing:

Forging Back up Roll for Sheet and Strip Coil Rolling Mill

Material and Properties:
The following table gives a general overview of our main grades for rolls and all kinds of the material are in forging process.
 

TypeMain MaterialHardnessHardness UniformityDepth of hardnessSize
Back-up Roll9Cr2Mo (2% Cr)55-80 HSD4HSD30mm¢500-800mm
70Cr3Mo (3% Cr)55-80 HSD4HSD60mm¢500-1800mm
45Cr4NiMoV (4% Cr)55-80 HSD4HSD75mm¢1000-1800mm
YB-70 (5% Cr)55-80 HSD4HSD100mm¢1000-1800mm

Applications:
The back up rolls are used in cold rolling mill of 4Hi, 6Hi reversing reduction mill and tandem mills, as well as temper mills and skin pass mills. ALso, the back up rolls are used in hot strip rolling mill.