Metallurgical solutions for new top performance non-oriented electrical steel for cores

Abstract

The link is made between magnetic properties, metallurgical parameters & process control, by using a material modeling approach. Within the iron loss formulation, the coefficients of the hysteresis, the eddy current and the excess losses are linked to chemical, structural and textural elements of the steel metallurgy. A particular focus is put on the surface and subsurface precipitation state. In particular for high frequency applications, such as automotive traction, thin electrical steels are used to reduce the eddy current losses, so the surface related effects become relatively more important and their proper control can bring a relevant performance enhancement. Such production parameter optimization is implemented in ArcelorMittal's iCARe™ automotive product range.