Effect of Cold Rolling Prior to Annealing on the Grain Size-Energy Losses Relationship in a Low Carbon Grain Non-Oriented Semi-Processed Electrical Steel

In this work, the effect of cold deformation prior to annealing treatment on microstructure and magnetic hysteresis energy losses in a low carbon grain non-oriented semi-processed electrical steel with 0.60 mm thickness was investigated. The samples were subjected different percentages deformation, range 5–20% reduction annealed at temperatures between 650 950 °C for 60 min, these characterized by Optical Microscopy. Meanwhile calculated from loops using Vibrating Sample Magnetometer. experimental results showed that increases 50% when is deformed 20%, due microstructural defects are introduced material during deformation. presence verified through measurements Full Width Half Maximum means X-ray diffraction. On other hand, it observed below Ac1 causes only small changes steel, however, promotes recovery properties respect material. contrast, Ac3 (α+γ) recovered ~33% initial state and, values higher than 65% compared greatest (20%), as result both modification evolution size experienced