Texture and properties of a new Fe-Si-P solid solution strengthening high strength electrical steels

In this study solid solution strengthening mechanism was introduced to increase the mechanical and magnetic properties of non-oriented silicon steel. Compared with the P-free steel, the annealed texture of 0.1P-containing steel whose gamma orientation was almost completely eliminated consisted of strong eta-fiber, near-Cube, and near-Goss orientation grains. The texture factor was increased from 1.25 to 4.27. Therefore, the magnetic properties of 0.1P steel was significantly improved and B50 and P10/400 were optimized to 1.712 T and 22.92 W/kg, respectively. When the frequency was 400 Hz, in the 0.1P steel core loss decrease was mainly because of hysteresis loss, which decreased by 38.6 %, and eddy current loss also decreased by 2.3 %. The addition of P resulted in a decrease in coercivity. Furthermore, the 0.1P steel had superior magnetic properties compared to P-free steel with yield strength and tensile strength of 581 MPa (increase of 8.1 %) and 692 MPa (increase of 7.8 %). Thus, it is underscored that the addition of 0.1 wt% P to 4.5 wt% Si steel can simultaneously improve both magnetic properties and mechanical properties.