LOW-MAGNETOSTRICTIVE ORIENTED SILICON STEEL AND MANUFACTURING METHOD THEREFOR

    公开(公告)号:EP4261853A1

    公开(公告)日:2023-10-18

    申请号:EP22736629.1

    申请日:2022-01-11

    摘要: A manufacturing method for low-magnetostrictive oriented silicon steel is provided, wherein the oriented silicon steel comprises a silicon steel substrate and an insulating coating on the surface of the silicon steel substrate. The manufacturing method comprises: performing single-sided laser etching on the silicon steel substrate, wherein the side of the silicon steel substrate, on which single-sided laser etching is performed, is a first surface, and the side opposite to the first surface is a second surface; determining a deflection difference between the first surface and the second surface based on the power of the laser etching, and determining a difference in the amount of the insulating coatings on the first surface and the second surface based on the deflection difference; and forming insulating coatings on the first surface and the second surface. The amount of the insulating coating on the second surface is greater than that on the first surface, and the amount of the insulating coating on the first surface and that on the second surface satisfy the difference in the amount of the insulating coatings. By using the manufacturing method in the present invention, the problem of a relatively large magnetostrictive deviation between two sides of oriented silicon steel caused by single-sided laser etching can be solved. Oriented silicon steel manufactured by the aforementioned manufacturing method is also provided. A transformer iron core prepared using the oriented silicon steel enables a transformer to have low noise during operation.

    FECOV-LEGIERUNG UND VERFAHREN ZUM HERSTELLEN EINES BANDS AUS EINER FECOV-LEGIERUNG

    公开(公告)号:EP4027357A1

    公开(公告)日:2022-07-13

    申请号:EP21215546.9

    申请日:2021-12-17

    摘要: In einem Ausführungsbeispiel ist eine FeCoV-Legierung mit der Zusammensetzung bereitgestellt, die im Wesentlichen aus 30 Gew. % ≤ Co ≤ 55 Gew. %, 0,4 Gew. % ≤ V ≤ 1,5 Gew. %, 0,04 Gew. % ≤ Nb ≤ 0,10 Gew. %, 0,0 Gew. % ≤ Ta ≤ 0,20 Gew. %, 0,04 Gew. % ≤ Nb + 0,5·Ta ≤ 0,15 Gew. %, max. 0,02 Gew. % C, 0,0 Gew. % ≤ Si ≤ 0,50 Gew. %, 0,0 Gew. % ≤ Al ≤ 0,50 Gew. %, max. 0,5 Gew. % Mn, max. 0,5 Gew. % Cr, max. 0,5 Gew. % Ni, max. 0,5 Gew. % W, max. 0,5 Gew. % Mo, max. 0,5 Gew. % Zr, Rest Fe, sowie bis zu 1 Gew. % weitere Verunreinigungen besteht, und die einen Phasenübergang von einem ferritischen α Phasengebiet in ein ferritisch/austenitisches α+γ Mischgebiet aufweist, der bei einer Übergangstemperatur T(α/α+γ) stattfindet, wobei T(α/α+γ) ≥ 900°C, vorzugsweise ≥ 920°C, vorzugsweise ≥ 940°C.