Laser treatment of electrical steels and other magnetic materials

摘要

Different techniques for reducing magnetic losses of grain-oriented silicon steel by laser irradiation have been examined. The explanation for the effects is given. The significant decrease in magnetic losses was found after a local laser treatment of an ultrathin strip of fine-grained anisotropic electrical steel. Magnetic loss in amorphous ribbons was found to be essentially reduced to 30% by local laser treatment in a wide range of magnetizing reversal frequencies. Special laser system for realization local irradiation techniques is considered.