| A Study on Demagnetization Technique of a Steel Tube using an Anhysteretic Magnetization |
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Young-Hak Kim, Chang-Seob Yang, Kwang-Ho Shin |
1Pukyong National University
2Agency for Defense Development
3Kyungsung University |
| 비히스테리자화에 의한 강관의 탈자 기법 연구 |
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김영학, 양창섭, 신광호 |
1부경대학교
2국방과학연구소
3경성대학교 |
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| Abstract |
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In this study, we investigated whether the anhysteretic demagnetization process would be applicable to remove a complicated magnetization of a steel tube as a part of the experimental earlier study for a deperming of naval vessel. The magnetic tube used in this study was a 10cm-long and 1cm-diameter steel tube, and magnetized with a E-shape ferrite core to form a nonuniform magnetization in it. In the anhysteretic demagnetization process, a dc magnetic field applied along the longitudinal direction of the tube decreased from ${pm}$3kA/m to zero-field with the step of ${pm}$300A/m. At the same time, an ac bias magnetic field with the frequency of 60Hz and the field intensity of 300A/m was excited along the circumstantial direction of the tube. It was found that the anhysteretic process was useful to demagnetize a small-object like a steel tube from the experimental results showing the residual magnetization reduced over 90%. |
| Key Words:
Deperming, Anhysteretic Demagntization, Residual Magnetization |
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