A method of non-destructive inspection of rolls for hot and/or cold rolling of steel strips/coils.

摘要

The present invention relates to a method of non destructive inspection of surface defects of rolls of Hot Strip Mill and Cold Rolling Mill in Steel Plant involving portable Ultrasonic and Eddy Current Flaw Detectors wherein probes of selective type and range are used with selective frequencies for locating flaws and flaw detectors are duly calibrated on reference block of known defects, setting of the flaw detector is adjusted so as to filter the defect signal from the noise signal and analyse the signals to understand the presence or absence of defects with reference to the calibration data and decide upon the stock removal accordingly, resulting in substantial reduction in roll consumption and avoiding production delays leading to considerable financial saving.