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2 155 233

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Application

99110337/02, 1999-05-17

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Start date

1999-05-17

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Actual filing date

1999-05-17

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Published

2000-08-27

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Inventor

Nastich V.P.Cheglov A.E.Barjatinskij V.P.Mindlin B.I.Parakhin V.I.Dolmatov A.P.Milovanov A.A.

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo Metallurgicheskij Kombinat"

METHOD OF PRODUCTION OF COLD ROLLER ELECTRICAL-SHEET ISOTROPIC STEEL Russian patent published in 2000 - IPC

Abstract RU 2155233 C1

FIELD: 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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RU 2 155 233 C1

Authors

Nastich V.P.

Cheglov A.E.

Barjatinskij V.P.

Mindlin B.I.

Parakhin V.I.

Dolmatov A.P.

Milovanov A.A.

Dates

2000-08-27—Published

1999-05-17—Filed

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