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Secondary scales due to poor descaling - Hot rolled products - Rolling defects


Figure 1: Secondary scales due to poor descaling.

Defect name: No data.
Record No.: 3364
Type of defect (Internal/Surface): Surface
Defect classification: Rolling defects
Steel name: Steel
Steel composition in weight %: No data.
Note:  Secondary scales due to poor descaling.
Origin/root cause
- Improper descaling/failure of secondary descaler.
- Nozzle clogging.
- Low pressure of descalling water.
Remedy/process control
- Maintain high descaler pressure (>180 bar).
- Take impression/correction of nozzle impression.
Reference: Not shown in this demonstration version.