| 摘要 |
production of cold roller isotropic electrical-sheet steel; ferrous metallurgy. SUBSTANCE: after cold rolling to depth of 0.5 mm, steel is subjected to recrystallization annealing at heating to temperature determined from the following dependence: , where Topt is optimal recrystallization annealing temperature, C; a0=771 C is dimensional coefficient; a1= 28071°C%2 HB is volume fraction of non-metallic inclusions in semi- finished rolled product, %; a2= 7416°C/%2 is dimensional coefficient; Al is mass fraction of aluminium in metal, %; N is mass fraction of nitrogen in metal, %; a3= 833°C/% is dimensional coefficient; C is mass fraction of carbon in metal, %; a4= 4,2°C/% is dimensional coefficient; E is total reduction at cold rolling, %. EFFECT: improved electromagnetic properties of finished isotropic steel. 5 ex, 1 tbl
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