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2 237 106

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IPC

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Application

2003119693/02, 2003-07-03

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Start date

2003-07-03

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Actual filing date

2003-07-03

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Published

2004-09-27

(72)

Inventor

Bobylev M.V.Kulapov A.N.Stepanov N.V.Antonova Z.A.Lekhtman A.A.Gontaruk E.I.Peshev A.D.Lamukhin A.M.Vodovozova G.S.Koroleva E.G.

(73)

Holder

Obshchestvo S Ogranichennoj Otvetstvennost'Ju Inso"

STRUCTURAL STEEL Russian patent published in 2004 - IPC

Abstract RU 2237106 C1

FIELD: metallurgy.

SUBSTANCE: invention relates to the development of structural high-strength steel designated for making welded constructions for different aims. Invention claims structural steel comprising components taken in the following ratio, wt.-%: carbon, 0.16-0.20; manganese, 0.60-1.00; silicon, 0.15-0.35; nickel, 0.70-1.00; chrome, 0.40-0.65; molybdenum, 0.40-0.65; vanadium 0.03-0.08; copper, 0.15-0.25; boron, 0.0005-0.0050; titanium, 0.01-0.03; nitrogen, 0.005-0.015; iron and impurities, the balance, in accomplishing the following ratios: N/(Ti + 10 x B) ≤ 0.24, and Mn + Cr + Mo ≥ 1.7. As impurities steel comprises, wt.-%: sulfur, below 0.025; phosphorus, below 0.025, and aluminium, below 0.06. Invention provides enhancing hardenability indices of the claimed steel that provides guaranteed level of consumers' properties of sheets in thickness below 65 mm and bar rolled products with diameter below 75 mm.

EFFECT: improved and valuable properties of steel.

2 cl, 2 tbl, 1 ex

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RU 2 237 106 C1

Authors

Bobylev M.V.

Kulapov A.N.

Stepanov N.V.

Antonova Z.A.

Lekhtman A.A.

Gontaruk E.I.

Peshev A.D.

Lamukhin A.M.

Vodovozova G.S.

Koroleva E.G.

Dates

2004-09-27—Published

2003-07-03—Filed