Influence of increase mechanical cutting degradation on 50 Hz magnetic properties of non-oriented electrical steels

In this paper is point out the influence of the classical mechanical cutting on the magnetic properties of three industrial non-oriented electrical steels M400-50A, M400-65A and, M700-50A. The selected materials were magnetically characterized and analyzed at 50 Hz and at a peak magnetic polarization JP ∈ {50, 100, 250, 500, 800, 1000, 1100, 1200, 1300, 1400, 1500} mT. Based on the complex permeability concept, in which the total permeability is divided into two parts, the real and the imaginary component, the measured values are presented. All the investigated strips have a length of 300 mm and, to magnify the degradation, a decreasing width of 30, 15, 10, 7.5 and 5 mm were chosen. The magnetic characterization was performed on a laboratory single strip tester (SST) set-up, which can make standardized measurements on samples with an area of 300 mm × 30 mm. To reassemble the standard width of 30 mm, there were put together side by side 2, 3, 4 and 6 pieces.