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2 224 815

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IPC

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Application

2002123610/02, 2002-09-04

(24)

Start date

2002-09-04

(22)

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"

CONSTRUCTIONAL STEEL FOR ELECTROTHERMOTREATMENT Russian patent published in 2004 - IPC

Abstract RU 2224815 C1

FIELD: metallurgy; constructional economically-alloyed steel production. SUBSTANCE: the invention presents constructional economically- alloyed steel with the two-phase ferrite-martensitic structure used at a cold heading of high-strength rod fixing details. The offered. steel contains the following components in the ratio (in mass %): carbon- 0.06-0.11; manganese - 0.30-0.9; silicon - 0.01-0.15; boron - 0.0005- 0.0050; vanadium - 0.005-0.08; aluminum - 0.02-0.06; the titanium - 0.01-0.04; sulfur - 0.005-0,020; nitrogen - 0.005-0.015; calcium - 0.001-0.010. At that: Ti/48 + Al/27 - N/14 ≥ 0.6 x 1010^-3; Mn + 0.5 x C ≥ 0.80; Ca/S ≥ 0.065. Technical result of the invention is increase of characteristics of hardenability of the stated steel that will allow to ensure the guaranteed level of a consumer properties and through hardenability of the metal products with a diameter up to 20 mm. EFFECT: the invention allows to increase the steel hardenability and to provide the guaranteed level of the steel consumer properties. 2 tbl

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RU 2 224 815 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