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2 224 814

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Application

2002123608/02, 2002-09-04

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Start date

2002-09-04

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Actual filing date

2002-09-04

(45)

Published

2004-02-27

(72)

Inventor

Bobylev M.V.Gontaruk E.I.Zakirov D.M.Kulapov A.N.Lekhtman A.A.Majstrenko V.V.Stepanov N.V.Fomin V.I.

(73)

Holder

Obshchestvo S Ogranichennoj Otvetstvennost'Ju Inso"

HIGH-DUCTILITY CONSTRUCTIONAL STEEL FOR COLD VOLUMETRIC PRESS FORMING Russian patent published in 2004 - IPC

Abstract RU 2224814 C1

FIELD: metallurgy; production of high-ductility constructional steel of increased hardenability. SUBSTANCE: the invention is dealt with metallurgy, in particular with development of the constructional forming high-strength steel intended for manufacture of complicated shape heat-strengthened details by a method of cold volumetric press forming. Offered steel contains components in the following ratio (in mass %): carbon - 0.08-0.15; manganese - 0.90-1.40; silicium - 0.01-0.17; molybdenum - 0.01-0.10; boron - 0.0005-0.0050; titanium - 0.01-0.04; sulfur - 0.005-0.020; aluminum - 0.02-0.06; calcium - 0.001-0.010; nitrogen - 0005-0.015. At that: N / (Ti + 0.5 Al + 10B)≤ 0.21; 5 ≤ 4/C - Mn/0.055 ≤ 26.5; Ca/S ≤ 0.065. Technical result of the invention is improved characteristics of the steel hardenability that will allow to ensure through hardenability of a billet with a diameter up to 25 mm, at provision of high strength and plasticity. EFFECT: improved characteristics of the steel hardenability and high strength and plasticity. 2 tbl

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RU 2 224 814 C1

Authors

Bobylev M.V.

Gontaruk E.I.

Zakirov D.M.

Kulapov A.N.

Lekhtman A.A.

Majstrenko V.V.

Stepanov N.V.

Fomin V.I.

Dates

2004-02-27—Published

2002-09-04—Filed