FeCo alloy, FeSi alloy or Fe sheet or strip, and a method of making the same, a magnetic transformer core made from sheet or strip, and a transformer comprising the same

摘要

The present invention relates to a FeCo alloy, a FeSi alloy or a Fe sheet or strip, a method of making the same, a magnetic transformer core made from a sheet or a strip, and a transformer comprising the same, wherein the sheet of cold rolled and annealed iron alloy (1) the composition of which is a sheet or strip having a trace amount ≤ Si ≤ 1.0% and a trace amount ≤ Co 35% for trace amounts ≤ Co ≤ 40% and Co ≥ 35% Mo + Ni = 4%, trace amount Mn = 4%, and trace amount = 3.5% , Trace amount ≤ Al ≤ 3%, trace amount ≤ S ≤ 0.005%, trace amount ≤ P ≤ 0.007%, trace amount ≤ Ni ≤ 3%, trace amount ≤ Cu ≤ 0.5%, trace amount ≤ Nb ≤ 0.1%, trace amount ≤ Zr ≤ 0.1% A trace amount ≦ Ti ≦ 0.2%, a trace amount ≦ N ≦ 0.01%, a trace amount ≦ Ca ≦ 0.01%, a trace amount ≦ Mg ≦ 0.01%, a trace amount ≦ Ta ≦ 0.01%, a trace amount ≦ B ≦ 0.0 0% and 0%, and the remainder is iron and impurities produced from the manufacture, and for the induction of 1.8T, the three strip samples (2, 3, 4) The maximum difference (Max DELTA lambda) between the sagittal distortion amplitude? Measured in parallel (? // H) to the magnetic field Ha and perpendicular (?? H) to the applied magnetic field Ha is at most 25 ppm, Each side being parallel to the rolling direction (DL) of the sheet or strip and parallel to the transverse direction (DT) of the sheet or strip and having an angle of 45 DEG with the rolling direction (DL) and the transverse direction And a recrystallization ratio of 80 to 100%, a method for producing such a sheet or strip, a transformer magnetic core made therefrom, and a transformer comprising the same.