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2 139 943

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IPC

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Application

98110620/02, 1998-06-04

(24)

Start date

1998-06-04

(22)

Actual filing date

1998-06-04

(45)

Published

1999-10-20

(72)

Inventor

Komratov Ju.S.Kuzovkov A.Ja.Polushin A.A.Chernushevich A.V.Il'In V.I.Fetisov A.A.Pilipenko V.F.Isupov Ju.D.Vinogradov S.V.

(73)

Holder

Oao Metallurgicheskij Kombinat"

METHOD FOR MAKING HIGH QUALITY STEEL Russian patent published in 1999 - IPC

Abstract RU 2139943 C1

FIELD: metallurgy, namely out-of-furnace treatment of metal. SUBSTANCE: method comprises steps of introducing aluminium and powder calcium-silicon wire in ladle filled with metal at vacuumizing and achieving oxygen activity in range 0.0010-0.0015%. Aluminium wire is introduced at rate 2.0-4.0 m/s; consumption of aluminium wire is equal to 0.07-0.17 kg/ton of steel. Powder calcium-silicon wire is introduced at rate 3.5-4.0 m/s; its consumption is equal to 1.2-2.0 kg/ton of steel. Vacuumizing of metal is terminated at once after introducing necessary amount of wire. EFFECT: enhanced quality of vacuumized metal, its ameliorated structure. 2 tbl, 1 ex

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RU 2 139 943 C1

Authors

Komratov Ju.S.

Kuzovkov A.Ja.

Polushin A.A.

Chernushevich A.V.

Il'In V.I.

Fetisov A.A.

Pilipenko V.F.

Isupov Ju.D.

Vinogradov S.V.

Dates

1999-10-20—Published

1998-06-04—Filed