ANISOTROPIC ELECTRICAL STEEL SHEET Russian patent published in 2022 - IPC C22C38/02 C22C38/60 C21D8/12 H01F1/16 H01F1/18 

FIELD: metallurgy.

SUBSTANCE: invention relates to the field of metallurgy, namely to a sheet of anisotropic electrical steel used as core material of transformers. The sheet has a chemical composition containing in wt.%: from 2.0 to 7.0 of Si, from 0 to 0.030 of Nb, from 0 to 0.030 of V, from 0 to 0.030 of Mo, from 0 to 0.030 of Ta, from 0 to 0.030 of W, no more than 0.0050 of C, from 0 to 1.0 of Mn, from 0 to 0.0150 of S, from 0 to 0.0150 of Se, from 0 to 0.0650 of Al, from 0 to 0.0050 of N, from 0 to 0.40 of Cu, from 0 to 0.010 of Bi, from 0 to 0.080 of B, from 0 to 0.50 of P, from 0 to 0.0150 of Ti, from 0 to 0.10 of Sn, from 0 to 0.10 of Sb, from 0 to 0.30 of Cr, from 0 to 1.0 of Ni, the rest is Fe and impurities. The sheet has texture aligned with the Goss orientation, in which following conditions are met: |γ₂ - γ₁| ≥ 0.5° and [(α₂ - α₁)² + (β₂ - β₁)² + (γ₂ - γ₁)²]^1/2 ≥ 2.0°, where (α₁, β₁, γ₁) and (α₂, β₂, γ₂) are angles of deviation of the crystallographic orientation measured at two measurement points that are adjacent on the sheet surface and that have an interval of 1 mm, while α is the angle of deviation from the ideal Goss orientation based on the axis of rotation parallel to the direction of the normal Z, β is the angle of deviation from the ideal Goss orientation based on the axis of rotation parallel to the transverse direction C, γ is the angle of deviation from the ideal Goss orientation based on the axis of rotation parallel to the direction of rolling L.

EFFECT: sheet has improved magnetostriction in the range of strong magnetic fields.

14 cl, 3 dwg, 39 tbl, 4 ex