Effect of machining methods on mechanical and magnetic properties of high-strength non-oriented silicon steel containing Cu
Effect of wire cutting and laser cutting on microstructure,mechanical and magnetic properties of high-strength non-oriented silicon steel containing Cu was studied using optical microscope,electron backscatter diffraction technique,universal tensile testing machine and magnetic property measuring instrument.The results show that laser cutting can coarsen the grain size at the machining edge of the sample,while wire cutting can refine the grain size at the machining edge,and both the affected area sizes are approximately 0.21 mm.In addition,stress concentration is observed at the machining edge of the sample with wire cutting.Due to the influence of machining methods on the grain size and stress state of the sample,the hardness value of the machining edge area of the wire cutting sample is higher than that of the laser cutting sample,and the tensile strength and yield strength are both higher than those of the laser cutting sample.Meanwhile,the magnetic induction of the wire cutting sample is slightly lower than that of the laser cutting sample,and the iron loss is significantly higher than that of the laser cutting sample.
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