As the liner is a part of the integral mill design, it has to remain its dimensional shape and hardness.
If a liner wears out and the dimension is changing gradually, it does allow inaccuracies in the rolling operations. Position of work rolls and/or back up rolls may get out of tolerance, the crown, or cross section of the rolled strip will get out of tolerance, or thickness may get wavy.
Dispositioned liners cause higher wear on bearings and mill rolls, and marking on the rolls, which are transferred to the end product, the strip.
Liners need to withstand load impact, erosion, wear, friction, corrosion and vibrations.
Surface Hardened Liners
These are made out of one piece of material, which can be:
- Carbon steel C45 (1.0503)
- Corrosion resistant steel X40Cr13 (1.2083)
The surface is induction hardened with a depth of 3-5 mm, sufficient to accommodate the maximum allowable design wear of a liner.
The non hardened part of the liner will function as a dampener. The liner is a solid liner, material stress is minimized, tension and crack problems are history. This proven design of liner carries all the positive properties of other available liner types, while leaving out the disadvantages.
The liner is a smart and simple design, meeting highest performance standards. Its price-performance ration resulted in a high rating of satisfaction amongst the numerous user.
|C45||60 +/-2||3-5 mm|
|X40Cr13||56 +/-2||3-5 mm|