SHEET FROM NON-TEXTURED ELECTRICAL STEEL AND METHOD OF MANUFACTURING THEREOF Russian patent published in 2019 - IPC C22C38/06 C22C38/04 C21D8/12 H01F1/147 H01F1/16 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, namely to sheet from non-textured electrical steel used as material of iron cores of engines. Sheet has a chemical composition containing the following in wt. %: C: not more than 0.0050, Si: 0.1–5.0, Mn: 0.02–3.0, sol. Al: not more than 0.0050, P: not more than 0.2, S: not more than 0.0050, N: not more than 0.0040, rest is Fe and unavoidable impurities. Total concentration of Ca in steel is 0.0010–0.0080 wt. %, total concentration of oxygen is not more than 0.0100 wt. %, ratio of total concentration of Ca to total concentration of oxygen is not less than 0.50 and not more than 2.0, and ratio in composition of CaO steel to SiO₂ in present oxide inclusions in section along thickness of sheet in direction of rolling and having size in direction of sheet thickness of not less than 0.2 mcm is 0.50–4.0.

EFFECT: high magnetic flux density and low losses in iron.

8 cl, 2 dwg, 3 tbl, 3 ex