FIELD: metallurgy.
SUBSTANCE: invention relates to metallurgy, namely to sheet of non-textured electrical steel used as material of steel core of high-efficiency asynchronous motor. Sheet has a chemical composition containing the following in wt%: C: 0.0050 or less, Si: 1.50 or more and 4.00 or less, Al: 0.500 or less, Mn: 0.10 or more and 5.00 or less, S: 0.0200 or less, P: 0.200 or less, N: 0.0050 or less, O: 0.0200 or less, balance – Fe and unavoidable impurities. Sheet has temperature Ar3 phase transformation 700 °C or higher, grain size of 80 mcm or more and 200 mcm or less, and Vickers hardness of 140 HV or more and 230 HV or less.
EFFECT: obtaining materials having good balance of magnetic flux density and core loss characteristics without annealing in the hot state zone.
4 cl, 2 dwg, 3 tbl
