CO2 laser processing for reducing core loss of cold-rolled grain-oriented silicon steel |
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Authors: | S C Patil G Swaminathan Manoj Kumar P V Sastry S B Ogale S M Kanetkar A Pramanik |
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Affiliation: | (1) Centre for Advanced Studies in Materials Science and Solid State Physics, Department of Physics, University of Poona, 411 007 Pune, India;(2) Corporate Research and Development Division, Bharat Heavy Electricals Limited, 500 593 Vikasnagar, Hyderabad, India |
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Abstract: | Non-contact processing technique involving the use of CW and pulsed CO2 laser irradiation has been used for reducing the core loss of cold-rolled grain-oriented silicon steel. Laser scribing perpendicular
to the rolling direction resulted in a refinement of domain wall spacing which subsequently reduced the loss of silicon steel.
It was found that laser irradiation was more effective in a specimen with higher magnetic induction (Hi-B) and the loss was
reduced by more than 10% under optimum conditions of the laser irradiation and the scribing speed. Since laser processing
is a non-contact technique, it can be easily applied to the production line of the silicon steel. |
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Keywords: | Hi-B silicon steel laser scribing domain refinement power loss |
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