Abstract: On-line determined core loss data are massively produced during production of electrical steels and these data provide timely much more and much valuable information for the evaluation and adjustment of product properties. However, the application of such data for property evaluation and control is still far from satisfactory in steel plants, namely neither are they used for the evaluation of whole coil of a steel strip and determination of the effects of parameter changes on the magnetic properties, nor for the further selfdiagnosis of different kinds of problems reflected in the online core loss curves. This work collects some online core loss curves and analyzes their features and possible existing problems or phenomena based on the difficulties encountered during searching the relationship between processing parameters and magnetic properties. Suggestions for evaluating the properties of whole coils of electrical steel strips quantitatively are given and a preliminary version of software is compiled hoping that this may get the attention from industry to best making use of online core loss data for evaluating properties of whole coils of strips.

Key words: electrical steels, on-line core loss, data evaluation, product quality