NON-ORIENTED MAGNETIC PLATE STEEL, AND ITS MANUFACTURING METHOD Russian patent published in 2013 - IPC C21D8/12 C22C38/12 C22C38/06 C21D9/46 H01F1/147 H01F1/16 

FIELD: metallurgy.

SUBSTANCE: steel contains the following, wt %: C 0.005 or less, Si - 2 to 4, Mn and V in total 11 or less, Al 3 or less, Fe and inevitable impurities are the rest. Concentrations of Mn and V in the thickness direction correspond to the following expression: 0.1 < (Xs_Mn.v - Xc_Mn,v) / t_Mn,v ^< 100, where Xs_Mn,v means a sum of Mn and V concentrations on the surface of a steel plate, Xc_Mn,V means a sum of Mn and V concentrations in the centre of the steel plate, ans t_Mn,_V means depth, mm, from the steel plate surface to the position, in which the sum of Mn and V concentrations is equal to Xc_Mn,v.

EFFECT: use of the proposed steel allows complete reduction of losses in a core in a high-frequency range.

10 cl, 10 dwg, 2 tbl