SHEET OF NON-TEXTURED ELECTRICAL STEEL AND THE METHOD FOR ITS PRODUCTION Russian patent published in 2022 - IPC C21D8/12 C22C38/14 C22C38/28 C22C38/50 C22C38/60 H01F1/147 H01F1/16 

FIELD: metallurgy.

SUBSTANCE: invention relates to the field of metallurgy, namely to the production of a sheet of non-textured electrical steel used as a material for the manufacture of a rotor core of medium and large size, rotating at high speed, engine core. A sheet of non-textured electrical steel has a chemical composition containing, wt. %: C: no more than 0.0050, Si: 3.2-5.0, Mn: no more than 2.0, P: no more than 0.02, S: no more than 0.0050, Al: 0.5-2.0, N: no more than 0.0050, Ti: no more than more than 0.0030, Nb: no more than 0.0010, V: no more than 0.0050, O: no more than 0.0050, provided that Si + Al ≥ 4.0, if necessary, at least one element selected from: Sn: 0.005-0.20, Sb: 0.005-0.20, Ca: 0.0005-0.010, Mg: 0.0005-0.010, REM: 0.0005-0.010, Cr: 0.01-5, Cu: 0.01-5, Ni: 0.01-5, Mo: 0.0005-0.1, W: 0.001-0.1, Co: 0.01-5, As: 0.001-0.05 and B: 0.0001-0.005, the rest is Fe and the inevitable impurities. The degree of recrystallization is less than 100% in fractions of the area. The strength of C is no less than 2.0, and the strength difference C-D is no more than 2.0, where C represents strength at F = 0° and ϕ₁ = 0°, and D represents strength at F = 20° and ϕ₁ = 0° in the section ϕ₂ = 45° of the orientation distribution function obtained in the central layer according to the thickness of the sheet.

EFFECT: sheet has high strength and low losses in iron.

4 cl, 3 dwg, 5 tbl