Abstract:
A grain-oriented electrical steel sheet processed using magnetic domain segmentation treatment by having the steel sheet surface irradiated with an electron beam measuring 0.40 mm or less in diameter (d) in a linear area having a direction intersecting the rolling direction, wherein: modulated-irradiation linear areas are obtained by connecting repeating units in the linear-area direction; the period of the repeating units in the modulated-irradiation linear area is 2/3 × d to 2.5 × d mm; the repeating interval of the modulated-irradiation linear area in the rolling direction is 4.0-12.5 mm; and the intensity of the electron beam is brought to a level equal to or greater than that at which split magnetic domains are formed extending in the direction of the modulated-irradiation linear area at least on the irradiation-surface side, and up to a level at which the coating is not damaged and no plastic strain areas are formed on the irradiation-surface side. It is thereby possible to carry out the hitherto challenging magnetic-domain segmentation process in a transformer in which iron loss and noise are both low, and obtain a grain-oriented electrical steel sheet that has unprecedentedly low iron loss and magnetic distortion.
Abstract:
본 발명의 일 구현례에 의한 무방향성 전기강판은, 중량%로, Ti: 0.0030%이하(0%를 포함하지 않는다), Nb: 0.0035%이하(0%를 포함하지 않는다), V: 0.0040%이하(0%를 포함하지 않는다), 및, B: 0.0003 내지0.0020%이하를 포함하고, 잔부는 Fe 및 기타 불가피하게 첨가되는 불순물을 포함하되, ([Ti]+0.8[Nb]+0.5[V])/(10*[B]) 의 값이 0.17 내지 7.8 일 수 있다.
Abstract:
Die Erfindung betrifft ein Verfahren zum Herstellen eines ferromagnetischen Bauteils (17, 33) für einen Drehmomentsensor zum Erfassen eines auf eine Lenkwelle eines Kraftfahrzeugs aufgebrachten Drehmoments, durch Bereitstellen eines Blechelements aus einem ferromagnetischen Material, und durch Umformen des Blechelements zu dem ferromagnetischen Bauteil (17, 33), wobei als das ferromagnetische Material für das Blechelement ein Elektroblech verwendet wird.
Abstract:
A rare earth element-iron base permanent magnet and a process for its production are disclosed. The permanent magnet is produced by hot working of cast ingot prepared by melting and casting an alloy comprising at least one of rare earth metals represented by R, and Fe, B, and Cu at 500°C or above and has fine and magnetically anisotripic crystal particles. The process for its production comprises hot working of cast ingot obtained by melting and casting said alloy at 500°C or above. This process affords a permanent magnet having magnetic properties equivalent or superior to those of a permanent magnet produced by sintering which has been believed to have the best magnetic properties in a simplified manner, thus providing a permanent magnet with high performances inexpensively. In addition, heat treatment of the cast ingot obtained by melting and casting the aloy at 250°C or above, yields an isotropic rare earth earth element-iron base permanent magnet.