JP2020504783A - 方向性電磁鋼板の磁区の微細化方法 - Google Patents
方向性電磁鋼板の磁区の微細化方法 Download PDFInfo
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- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
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Abstract
Description
回復(Recovery)が現れる熱処理温度以上の応力緩和熱処理後にも鉄損改善効果を現わす永久磁区の微細化方法は、エッチング法、ロール法およびレーザー法に分けられる。
また、本発明の一実施例によれば、最終絶縁コート後の鋼板および絶縁コート層の密着性に優れる。
20 溝
Claims (10)
- 方向性電磁鋼板を準備する段階と、
レーザービームの出力に対する時間波形において、[出力変調周期時間](Ta)に対する[最大出力(Pmax)の10%以上の出力で照射した時間](Tb)の比(Tb/Ta)をデューティとして、前記デューティが98.0〜99.9%の準連続レーザービームを前記方向性電磁鋼板の表面照射して溝を形成する段階と、
を行うことを特徴とする方向性電磁鋼板の磁区の微細化方法。 - 前記準連続レーザービームの周波数は、100Hz〜8kHzであることを特徴とする請求項1に記載の方向性電磁鋼板の磁区の微細化方法。
- 前記準連続レーザービーム幅(W)に対するレーザービームの平均出力(P)の比(P/W)は、30W/mm〜300W/mmであることを特徴とする請求項1に記載の方向性電磁鋼板の磁区の微細化方法。
- 前記準連続レーザービームの鋼板の幅方向へのビーム長さ(L)に対する鋼板圧延方向へのビーム幅(W)の比(W/L)は、0.1〜0.86であることを特徴とする請求項1に記載の方向性電磁鋼板の磁区の微細化方法。
- 前記レーザーは、TEM00モードであり、ビームの品質ファクター(factor)であるM2が1.0〜1.1であることを特徴とする請求項1に記載の方向性電磁鋼板の磁区の微細化方法。
- 前記溝を鋼板の幅方向に断続的に3〜8個形成することを特徴とする請求項1に記載の方向性電磁鋼板の磁区の微細化方法。
- 前記溝は、線状であり、電磁鋼板の圧延方向に対し、82°〜98°の角度で形成することを特徴とする請求項1に記載の方向性電磁鋼板の磁区の微細化方法。
- 前記溝の深さ(D)を鋼板の厚さの3%〜8%で形成することを特徴とする請求項1に記載の方向性電磁鋼板の磁区の微細化方法。
- 前記溝を形成する段階の後に、
脱炭焼鈍または窒化焼鈍して鋼板の表面に酸化層を形成する段階と、
前記酸化層が形成された鋼板の表面に焼鈍分離剤を塗布して高温焼鈍して鋼板の表面に非金属酸化物層を形成する段階と、
をさらに行うことを特徴とする請求項1に記載の方向性電磁鋼板の磁区の微細化方法。 - 前記非金属酸化物層を形成する段階の後に、
前記非金属酸化物層上に絶縁コート層を形成する段階をさらに行うことを特徴とする請求項9に記載の方向性電磁鋼板の磁区の微細化方法。
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KR1020160177082A KR101944899B1 (ko) | 2016-12-22 | 2016-12-22 | 방향성 전기강판의 자구미세화 방법 |
KR10-2016-0177082 | 2016-12-22 | ||
PCT/KR2017/015128 WO2018131819A1 (ko) | 2016-12-22 | 2017-12-20 | 방향성 전기강판의 자구미세화 방법 |
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US20210229217A1 (en) * | 2020-01-27 | 2021-07-29 | National Technology & Engineering Solutions Of Sandia, Llc | Methods for site-specific enhancement of soft magnetic alloys |
JP6977814B2 (ja) * | 2020-05-15 | 2021-12-08 | Jfeスチール株式会社 | 線状溝形成方法および方向性電磁鋼板の製造方法 |
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EP3561088A4 (en) | 2019-11-27 |
US20210130922A1 (en) | 2021-05-06 |
CN110100018A (zh) | 2019-08-06 |
KR101944899B1 (ko) | 2019-02-01 |
WO2018131819A1 (ko) | 2018-07-19 |
KR20180073343A (ko) | 2018-07-02 |
US11313011B2 (en) | 2022-04-26 |
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