Abstract
Abstract The core loss of grain oriented electrical steel can be improved by an additional treatment process. For the industrial utilization, the CO2 or Nd:YAG lasers are most widely used for laser scribing with typical core loss improvements of about 10%. In this work, a high power CO2 laser and fiber laser up to 4 kW laser power are investigated under the aspect of industrial utilization. It was found that a specific parameter range for both laser beam sources was necessary to improve the core losses for the applied parameter range. Furthermore, an increase of the core loss improvement of 0.3 mm HiB (High-Permeability) electrical steel was investigated by using the fiber laser compared to the CO2 laser.
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