Development of High-strength Non-oriented Electrical Steel by TSCR

TSCR was simulated to develop high-strength non-oriented electrical steel with 3% of Si,0.83% of Al and 2.99% of Mn by solution strengthening,grain refinement strengthening and dislocation strengthening.The microstructures of hot rolled plates,normalized plates and annealed plates were analyzed.Furthermore,the mechanical properties and magnetic properties of products with different microstructures were detailedly studied.As the average grain diameter of the steel was 12.37 μm,the yield strength and the tensile strength of the steel were 530 MPa and 618 MPa respectively.As the annealing schedule of 700℃ × 4 min was applied and the microstructure of the product was totally unrecrystallized,the yield strength and the tensile strength of the steel were 853.5 MPa and 895.5 MPa respectively.As P_15/50 or P_10/400 of the steel was at the minimum value,the corresponding average grain diameter was larger than 60 μm; as P_10/800 or P_10/1000 was at the minimum value,the corresponding average grain diameter was between 12.37 μm and 59.67 μm.