The measurement and prediction of surface quality by new developments in EMATS and scarfing and the effect of scarfing on surface defects through the mills


This RFCS project have developed means of improving the surface quality of continuously cast product; firstly by the development of non-contact methods of detection of surface and near surface defects; secondly through the study of the effect of scarfing on defects before and after rolling; and lastly by optimising scarfing practices and investigating improved means of defect removal.
Two non-contact methods of defect detection have been developed; firstly via EMAT technologies which generates eddy currents and detects changes when defects are present; secondly via a method which recognises the spark pattern in the scarfing flame when a defect is encountered. The methods have the potential for on-line use at the caster and can be linked to a quality prediction scheme.

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