تاثیر انقطاع خطوط لیزر بر ساختار و خواص مغناطیسی ورقهای فولاد سیلیکونی جهت دار در فرایند حکاکی لیزر

نوع مقاله : علمی و پژوهشی

نویسندگان

1 گروه پژوهشی متالورژی، پژوهشگاه نیرو، تهران، ایران

2 دانش آموخته واحد علوم و تحقیقات، دانشگاه آزاد اسلامی، تهران، ایران.

3 گروه مهندسی مواد، واحد علوم و تحقیقات، دانشگاه آزاد اسلامی، تهران، ایران

چکیده

در تحقیق حاضر تاثیر انقطاع خطوط لیزر در حین فرایند حکاکی لیزر در حضور/عدم حضور یک میدان مغناطیسی خارجی بر روی تلفات هسته و ساختار حوزه های مغناطیسی در ورقهای فولاد سیلیکونی جهتدار بررسی شد. با اعمال الگوهای مختلف انقطاع، تاثیر طول انقطاع، یک طرفه یا دو طرفه اعمال کردن لیزر و نیز همپوشانی یا غیرهمپوشانی خطوط لیزر (برای ورقهای حکاکی شده دو طرفه) بر روی ساختار دامین ها و تلفات هسته ورقهای فولاد سیلیکونی ارزیابی شد. بر اساس نتایج این آزمایشها، شرایط بهینه حکاکی لیزر منقطع روی سطح ورقها بدست آمد. نتایج این تحقیق نشان می دهد اگرچه در طولهای انقطاع کوچک نظیر 2 میلیمتر، تاثیر فرایند لیزر روی کاهش تلفات ورقها ناچیز است، اما با افزایش طول انقطاع به حدود 6 میلیمتر، تلفات مغناطیسی ورقها تا حد زیادی بهبود می یابد. با افزایش مجدد طول انقطاع تا حدود 10 میلیمتر، تلفات ورقها دوباره افزایش می یابد و این نشان می دهد که طول انقطاع 6 میلیمتر، تلفات مغناطیسی بهینه را در ورقها ایجاد می نماید. استفاده از یک میدان مغناطیسی خارجی طولی همراه با تابش لیزر منقطع با الگوی انقطاع بهینه، منتج به کاهش تقریبا 16 درصد تلفات هسته در فولادهای سیلیکونی جهتدار می شود.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Effect of laser line interruption on the structure and magnetic properties of GO-silicon-steel-sheets in the laser scribing process

نویسندگان [English]

  • Mohammadreza Jahangiri 1
  • Hessam Bayani 2
  • Mohammad Ardestani 3
1 Metallurgy Research Group, Niroo Research Institute, Tehran, Iran
2 Department of Materials Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran.
3 Department of Materials Engineering, Science and Research Branch, Islamic
چکیده [English]

In this work, the effect of laser line interruption was studied on the structure and magnetic properties of grain-oriented silicon steel sheets during the laser-scribing process in the presence/absence of an external magnetic field. By applying different patterns of interruption, the effect of discontinuity length, one-sided or two-sided application of laser and overlapping or non-overlapping of laser lines (for sheets scribed on both sides) was investigated on the domain structure and core losses of silicon steel sheets. Based on the results of these experiments, the optimal conditions of discontinuous laser scribing were obtained. The results show that although at small interruption lengths such as 2 mm, the effect of laser scribing is negligible on reducing the core losses, but by increasing the interruption length to about 6 mm, the magnetic losses are greatly improved. By re-increasing the length of interruption to about 10 mm, the core losses increase again and this indicates that a break length of 6 mm creates optimal core losses in the sheets. Use of a longitudinal external magnetic field during the discontinuous laser irradiation with an optimum interruption pattern results in a reduction of about 16% in core losses in grain-oriented silicon steel sheets.

کلیدواژه‌ها [English]

  • Grain-oriented silicon steel
  • Laser scribing
  • Laser discontinuity
  • Domain structure
  • Core loss

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