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2 237 108

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IPC

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Application

2003124204/02, 2003-08-05

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Start date

2003-08-05

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Actual filing date

2003-08-05

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Published

2004-09-27

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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.Shtannikov P.A.

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Holder

Obshchestvo S Ogranichennoj Otvetstvennost'Ju Inso"

HIGH-STRENGTH STRUCTURAL STEEL Russian patent published in 2004 - IPC

Abstract RU 2237108 C1

FIELD: metallurgy.

SUBSTANCE: invention relates to the development of high-strength structural steel designated for making high-strength industrial holders and fasteners and welded constructions of different designation. The claimed steel comprises components taken in the following ratio, wt.-%: carbon, 0.12-0.21; manganese, 0.95-1.30; silicon, 0.20-0.35; sulfur, 0.004-0.015; nickel, 0.30-0.70; chrome, 0.40-0.65; molybdenum, 0.20-0.30; vanadium, 0.03-0.08; boron, 0.0005-0.0050; aluminium, 0.030-0.060; nitrogen, 0.005-0.015; calcium, 0.0005-0.0040; iron and impurities, the balance, in accomplishing the following ratios: N/(Al + 10 x B) ≤ 0.14, and Ca/S ≥ 0.065. As impurities this steel comprises, wt.-%: phosphorus, below 0.025, and copper, below 0.2. Invention provides enhancing steel hardenability indices that provides guaranteed level of consumers' properties of sheets including their enhanced hardness and wear resistance in thickness below 52 mm, and bar rolled products with diameter below 65 mm.

EFFECT: improved and valuable properties of steel.

2 cl, 2 tbl, 1 ex

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RU 2 237 108 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.

Shtannikov P.A.

Dates

2004-09-27—Published

2003-08-05—Filed