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2 237 105

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IPC

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Application

2003110349/02, 2003-04-14

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Start date

2003-04-14

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Actual filing date

2003-04-14

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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.

(73)

Holder

Obshchestvo S Ogranichennoj Otvetstvennost'Ju Inso"

STRUCTURAL STEEL WITH ENHANCED HARDENABILITY Russian patent published in 2004 - IPC

Abstract RU 2237105 C1

FIELD: metallurgy.

SUBSTANCE: invention relates to the development of structural high-strength steel designated for making welded constructions. Proposed steel comprises components taken in the following ratio, wt.-%: carbon, 0.15-0.21; manganese, 0.45-0.70; silicon, 0.17-0.35; boron, 0.0010-0.0050; nickel, 1.20-1.50; chrome, 0.01-0.20; niobium, 0.01-0.02; vanadium, 0.03-0.08; aluminium, 0.02-0.06; titanium, 0.01-0.04; nitrogen, 0.005-0.015; calcium, 0.001-0.010; sulfur, 0.005-0.02-; iron, the balance, in accomplishing of the following ratios: Ti/48 + Al/27 - N14 ≥ 0.6 x 10^-3 and Mn + 2 x Cr ≥ 0.7. Invention provides enhancing hardenability indices and providing the complete penetration hardenability of thermally improved sheets of thickness below 50 mm and bar rolled products of diameter below 65 mm.

EFFECT: improved and valuable properties of steel.

2 tbl, 1 ex

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RU 2 237 105 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

2003-04-14—Filed