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2 127 769

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C1

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IPC

(21) (22)

Application

98105991/02, 1998-03-17

(22)

Actual filing date

1998-03-17

(45)

Published

1999-03-20

(72)

Inventor

Zakirov D.M.Bobylev M.V.Lavrinenko Ju.A.Akimenkov A.N.

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo

STRUCTURAL STEEL Russian patent published in 1999 - IPC

Abstract RU 2127769 C1

FIELD: metallurgy, in particular, devising of structural steel for production of billets used in cold upsetting of articles. SUBSTANCE: structural steel contains carbon, manganese, silicon, boron, vanadium, aluminum, titanium, nitrogen and iron in the following ratio, wt.%: carbon, 0.18-0.24; manganese, 0.90-1.30; silicon, 0.17-0.37; boron, 0.0005-0.0050; vanadium, 0.01-0.08; aluminum, 0.02-0.06; titanium, 0.01-0.04; nitrogen, 0.005-0.015; iron, the balance; provided that the content of elements satisfies the following relationships , . EFFECT: increased hardenability characteristics and provision of throughout hardenability of thermally improved billets up to 25 mm in diameter. 2 tbl

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RU 2 127 769 C1

Authors

Zakirov D.M.

Bobylev M.V.

Lavrinenko Ju.A.

Akimenkov A.N.

Dates

1999-03-20—Published

1998-03-17—Filed

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