KR20200076501A - 방향성 전기강판 및 그의 제조 방법 - Google Patents
방향성 전기강판 및 그의 제조 방법 Download PDFInfo
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Abstract
[식 1]
밀착성 계수(Sad) = (0.8×R)/Hhill-up
(식 1에서 R은 산화물을 제거하는 단계 이후, 냉연판 표면의 평균 조도(㎛)를 나타내고, Hhill-up 은 산화물을 제거하는 단계 이후, 냉연판 표면에 존재하는 힐업의 평균 높이(㎛)를 나타낸다.)
Description
도 2는 본 발명의 일 실시예에 의한 그루브의 모식도 이다.
도 3은 본 발명의 일 실시예에 의한 그루브의 단면의 모식도이다.
| 구 분 | 평균입경 (㎛) |
실린더의 최소 직경 (Φ,mm) |
밀착성 계수 (무차수) |
R/ Hhill-up | 내식성 (A/cm2) |
| 실시예 1 | 5.0 | 16 | 0.016 | 0.02 | 1.42x10-9 |
| 실시예 2 | 4.2 | 16 | 0.02 | 0.025 | 1.45x10-9 |
| 실시예 3 | 3.4 | 15 | 0.04 | 0.05 | 1.35x10-9 |
| 실시예 4 | 1.3 | 15 | 0.06 | 0.07 | 1.37x10-9 |
| 실시예 5 | 2.1 | 12 | 0.08 | 0.10 | 1.29x10-9 |
| 실시예 6 | 1.9 | 12 | 0.10 | 0.12 | 1.25x10-9 |
| 실시예 7 | 0.8 | 12 | 0.25 | 0.31 | 1.13x10-9 |
| 실시예 8 | 0.5 | 12 | 0.40 | 0.50 | 1.10x10-9 |
| 실시예 9 | 1.7 | 10 | 0.60 | 0.75 | 1.05x10-9 |
| 실시예 10 | 1.3 | 10 | 0.80 | 1.00 | 1.02x10-9 |
| 비교예 | 0.3 | 25 | 0.014 | 0.018 | 2.20x10-8 |
20 : 그루브,
30 : 금속 산화물층,
40 : 아일랜드
Claims (10)
- 전기강판 표면에 위치하는 그루브,
상기 그루브 상에 위치하는 금속 산화물층 및
상기 그루브 하부에 위치하는 불연속적으로 분산 분포하는 금속산화물계 아일랜드를 포함하고,
상기 그루브 하부에 위치하는 아일랜드의 평균 입경은 0.5 내지 5㎛인 방향성 전기강판. - 제1항에 있어서,
상기 그루브 하부에 위치하는 아일랜드의 밀도는 0.5개/㎛2 이하인 방향성 전기강판. - 제1항에 있어서,
상기 전기강판을 봉상의 cylinder에 굽히는 경우, 절연코팅층의 박리 또는 균열이 되지 않는 최소의 직경이 25mm미만인 방향성 전기강판. - 제1항에 있어서,
상기 전기강판에 있어서, R / Hhill-up 은 0.02 내지 1.0인 방향성 전기강판.
(단, R은 산화물을 제거하는 단계 이후, 냉연판 표면의 평균 조도(㎛)를 나타내고, Hhill-up 은 산화물을 제거하는 단계 이후, 냉연판 표면에 존재하는 힐업의 평균 높이) - 냉연판을 제조하는 단계;
상기 냉연판에 그루브를 형성하는 단계;
상기 냉연판 표면에 형성된 Fe-O 산화물을 제거하는 단계;
상기 냉연판을 1차 재결정 소둔하는 단계; 및
상기 1차 재결정된 냉연판에 소둔 분리제를 도포하고, 2차 재결정 소둔하는 단계를 포함하고,
하기 식 1로 계산되는 밀착성 계수가 0.016 내지 1.13인 방향성 전기강판의 제조방법.
[식 1]
밀착성 계수(Sad) = (0.8×R)/Hhill-up
(식 1에서 R은 산화물을 제거하는 단계 이후, 냉연판 표면의 평균 조도(㎛)를 나타내고,
Hhill-up 은 산화물을 제거하는 단계 이후, 냉연판 표면에 존재하는 힐업의 평균 높이(㎛)를 나타낸다.) - 제5항에 있어서,
산화물을 제거하는 단계 이후, 냉연판 표면의 평균 조도(R)는 3.0㎛ 이하인 방향성 전기강판의 제조방법. - 제5항에 있어서,
산화물을 제거하는 단계 이후, 냉연판 표면에 존재하는 힐업의 평균 높이(Hhill-up)는 5.0㎛ 이하인 방향성 전기강판의 제조방법. - 제5항에 있어서,
상기 그루브를 형성하는 단계에서, 상기 냉연판에 레이저 또는 플라즈마를 조사하여 그루브를 형성하는 방향성 전기강판의 제조방법. - 제5항에 있어서,
상기 그루브를 형성하는 단계에서, 그루브 하부에 재응고층이 형성되는 방향성 전기강판의 제조방법. - 제5항에 있어서,
상기 산화물을 제거하는 단계 전의 조도는 냉연판 표면의 평균 조도(R)는 1.2㎛ 이상인 방향성 전기강판의 제조방법.
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| KR1020180165642A KR102133909B1 (ko) | 2018-12-19 | 2018-12-19 | 방향성 전기강판 및 그의 제조 방법 |
| US17/415,824 US12084736B2 (en) | 2018-12-19 | 2019-12-18 | Grain-oriented electrical steel sheet and manufacturing method therefor |
| PCT/KR2019/018028 WO2020130641A1 (ko) | 2018-12-19 | 2019-12-18 | 방향성 전기강판 및 그의 제조 방법 |
| CN201980085063.2A CN113228204B (zh) | 2018-12-19 | 2019-12-18 | 取向电工钢板及其制造方法 |
| EP19900374.0A EP3901972B1 (en) | 2018-12-19 | 2019-12-18 | Grain-oriented electrical steel sheet and manufacturing method therefor |
| JP2021536309A JP7620552B2 (ja) | 2018-12-19 | 2019-12-18 | 方向性電磁鋼板およびその製造方法 |
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| JP (1) | JP7620552B2 (ko) |
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| JP2023069941A (ja) * | 2021-11-08 | 2023-05-18 | Jfeスチール株式会社 | 方向性電磁鋼板 |
| WO2024136105A1 (ko) * | 2022-12-21 | 2024-06-27 | 주식회사 포스코 | 방향성 전기강판 및 그의 제조 방법 |
| US12051529B2 (en) | 2018-12-19 | 2024-07-30 | Posco Co., Ltd | Oriented electrical steel sheet and method for producing same |
| US12620513B2 (en) | 2018-12-19 | 2026-05-05 | Posco Co., Ltd | Oriented electrical steel sheet and method for manufacturing same |
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| EP4624612A4 (en) * | 2022-11-22 | 2026-04-15 | Nippon Steel Corp | GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND ITS MANUFACTURING PROCESS |
| JPWO2024111638A1 (ko) * | 2022-11-22 | 2024-05-30 |
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| Publication number | Publication date |
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| CN113228204A (zh) | 2021-08-06 |
| EP3901972C0 (en) | 2025-08-20 |
| US12084736B2 (en) | 2024-09-10 |
| WO2020130641A1 (ko) | 2020-06-25 |
| JP7620552B2 (ja) | 2025-01-23 |
| EP3901972B1 (en) | 2025-08-20 |
| EP3901972A4 (en) | 2022-03-09 |
| KR102133909B1 (ko) | 2020-07-14 |
| CN113228204B (zh) | 2024-01-16 |
| EP3901972A1 (en) | 2021-10-27 |
| JP2022515235A (ja) | 2022-02-17 |
| US20220042124A1 (en) | 2022-02-10 |
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