無方向性電磁鋼板における塑性変形による磁気特性劣化

カテゴリ: 研究会(論文単位)

論文No: MAG10186

グループ名: 【A】基礎・材料・共通部門 マグネティックス研究会

発行日: 2010/12/09

タイトル(英語): Magnetic Properties Deterioration Due to Plastic Deformation in Non-oriented Electrical Steel Sheets

著者名: 開道 力(北九州工業高等専門学校),新井 聡(新日本製鐵)

著者名(英語): Kaido Chikara(Kitakyushu National College of Technology),Arai Satoshi(Nippon Steel Corporation)

キーワード: 電磁鋼板|鉄損，　|磁界|塑性変形|剪断|electrical steel sheet|iron loss|magnetic field|plastic deformation

要約(日本語): 無方向性電磁鋼板は加工により少なからず塑性変形が加わるので、塑性変形による磁気特性の変化を調べた。塑性変形すると、磁化曲線の劣化と共に、鉄損の増加が顕著であるが、鉄損の増加は３倍から４倍で飽和した。劣化は結晶粒径と関係があり、結晶粒界密度が高い低級品ほど、劣化は大きい傾向を示した。

要約(英語): The effects of plastic deformations on the magnetic properties of non-oriented eletrical steel sheets are investigated in this paper. The deterioration induced by plasitc deformation is large at plastic deformation percentage of 0.1 %, but not much larger at higher deformation percentage. The deterioration is related to crystalline grain sizes of steel sheets, and may be mainly induced near grain boundaries which are hard to be deformed. The magnetic propertries in crystalline grain except near grain boundary may not become worse although grains are plastically deformed. It is interesting that the effect of plastic deformation on magnetic properties is similar to that of compressive stress. Atlow plastic deformation percentage, only a crystalline grain easy to be deformated is preferentially deformed and haslower permeability. Therefore, a magnetic flux distributes because a deformed grain have high permeability, and then eddy current losses increase. The magnetic properties of plastically deformed non-oriented electrical steel sheets may be improved in the case of suitable grain size and texture.

原稿種別: 日本語

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