Rauscher, P.P.RauscherHauptmann, J.J.HauptmannBeyer, E.E.Beyer2022-03-112022-03-112011https://publica.fraunhofer.de/handle/publica/374935The core loss reduction of grain-oriented electrical steel can be done by generating mechanical or thermal stress. Induced stress or residual stress due to plastic deformation refines the domains. Different methods for the domain refinement are known by literature like mechanical scratching, plasma irradiation, spark ablation and laser scribing. The further investigations are focused on the laser treatment using continuous-wave, highpower laser sources. The current investigations at the Technical University of Dresden in cooperation with the Fraunhofer IWS Dresden observe the macroscopic effects like hysteresis loop and the magnetic microstructure analysis (the domain structure using the Kerr-microscopy). Especially the correlation of core loss reduction and the domain refinement process d ue to laser treatment are of interest. The temperature field causes thermal stress due to the absorbed energy. Depending on the used wavelength, the laser power and the scan velocity, the damage of the coating occurs and the heat affected zone varied. The theoretical investigations are combined with experimental work. For the laser treatment under real process conditions a test plan will be set up to analysis the domain refinement. The beam deflection will be done with a galvanometer scanner system to obtain high flexibility.en620666621671conference paper