Determination of the Magnetic Degradation Profile on the Cutting-Edge of Mechanically Cut Electrical Steels

This article deals with a combined experimental/numerical approach to identify the degradation profile of the magnetic properties at the cutting edge of mechanically cut electrical steels. Using a dedicated magnetic measurement device combined with a specific magnetic characterization protocol and mechanical hardness measurements, the impacted distance to the cutting-edge (I.C-E) of a nonoriented (NO) Si–Fe electrical steel has been experimentally delineated. Then, thanks to a magneto-plastic model together with a finite element (FE) method-based numerical model, the I.C-E distance and the associated degradation profile have been determined by an inverse optimization method. The obtained results show that the degradation profile, although it follows a classical rapid decrease from the cutting edge, is quite different from those usually considered in the literature.