The effectiveness of closed loop defect location/repair in caster mill rolls

摘要

Roll inspection is necessary to ensure that rolls being returned to the hot plate mill following reconditioning are free from surface-breaking and internal defects that may cause the failure of the roll whilst in service. This paper describes the use of an automatic ultrasonic system for the inspection of caster rolls up to 3500 mm long and 800 mm diameter, and a scheme which uses the data obtained to control directly the renovation process.