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Application

2003119977/02, 2003-07-01

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Start date

2003-07-01

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Actual filing date

2003-07-01

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Published

2005-04-27

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Inventor

Stepashin A.M.Mul'Ko G.N.Zyrjanov V.V.Aleksandrov S.V.Zajtsev A.S.Markov D.V.Ladygin S.A.Prilukov S.B.

(73)

Holder

Ooo Stal'"

METHOD OF PRODUCTION OF ROLLED BLANKS Russian patent published in 2005 - IPC

Abstract RU 2250925 C2

FIELD: metallurgy; production of important rolled stock for oil-well tubing of increased service life.

SUBSTANCE: proposed method includes making steel of definite chemical composition in electric furnace, tapping metal from furnace into ladle, treatment of metal in ladle and teeming steel into ingot molds. Alloying with molybdenum is performed by introducing molybdenum-containing materials into furnace in making steel. After teeming, ingots are rolled, cooled and heated for rolling in preset temperature range and are subjected to preliminary and final deformation; process is completed by final cooling of rolled blanks to surrounding temperature.

EFFECT: improved strength characteristics and cold resistance of metal; enhanced reliability of metal products.

1 ex

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RU 2 250 925 C2

Authors

Stepashin A.M.

Mul'Ko G.N.

Zyrjanov V.V.

Aleksandrov S.V.

Zajtsev A.S.

Markov D.V.

Ladygin S.A.

Prilukov S.B.

Dates

2005-04-27—Published

2003-07-01—Filed

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