| 摘要 |
The invention relates to a cold-rolled, annealed ferrous alloy sheet or strip (1), characterised in that it consists of (by weight percentage): traces ≤ Co ≤ 40%; if Co ≥ 35%, traces ≤ Si ≤ 1.0%; if traces ≤ Co < 35%, traces ≤ Si ≤ 3.5%; if traces ≤ Co < 35%, Si + 0.6 %Al ≤ 4.5 – 0.1 %Co; traces ≤ Cr ≤ 10%; traces ≤ V + W + Mo + Ni ≤ 4%; traces ≤ Mn ≤ 4%; traces ≤ Al ≤ 3%; traces ≤ S ≤ 0.005%; traces ≤ P ≤ 0.007%; traces ≤ Ni ≤ 3%; traces ≤ Cu ≤ 0.5%; traces ≤ Nb ≤ 0.1%; traces ≤ Zr ≤ 0.1%; traces ≤ Ti ≤ 0.2%; traces ≤ N ≤ 0.01 %; traces ≤ Ca ≤ 0.01 %; traces ≤ Mg ≤ 0.01%; traces ≤ Ta ≤ 0.01%; traces ≤ B ≤ 0.005%; traces ≤ O ≤ 0.01%; the remainder being iron and impurities resulting from production. The sheet or strip is also characterised in that, for 1.8 T induction, the maximum deviation (Max ∆λ) between the magnetostriction deformation values λ, which are measured both parallel to the magnetic field (Ha) applied (λ//H) and perpendicularly to the magnetic field (Ha) applied (λ⊥H) over three rectangular samples (2, 3, 4) of the sheet or strip, of which the large sides are parallel to the sheet or strip rolling direction (DL), parallel to the cross direction (DT) of the sheet or strip, and parallel to the direction forming an angle of 45° with the rolling direction (DL) and the cross direction (DT), is at most 25ppm. The sheet or strip is further characterised by its recrystallisation rate of between 80 à 100%. The invention also relates to a method for producing such a sheet or strip, a magnetic transformer core produced using said sheet or strip, and a transformer comprising same. |
