Non-ferrous Backup Roll

Application of Non-ferrous Backup Roll

1. The back up roll supports the work roller to ensure high stiffness and small deformation of the work roller. Therefore, the back up roll should have good stiffness.

2. During working period, backup roll, work roll and intermediate roll are contact directly, easy to produce work hardening phenomenon, when overload, a local yield that the hardened layer at the bottom of the micro cracks produced subcutaneous, micro crack propagation resulting in roll spalling, which requires the backup roll has high contact fatigue strength, the reasonable stress state and the crack extension resistance.

3. The middle of the back up roll will be concave due to wear, and the contact stress at both ends of the roll body increases sharply, which leads to spalling. Therefore, it is required that the work roll has good wear resistance, in order to delay and reduce the formation of the concave roll.

4. The service cycle of the supporting roller is long, and the roller neck bears the alternating bending stress for a long time. In order to prevent the fracture of the roll neck, the roll neck is required to have good yield strength, toughness and fracture resistance.