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2 207 200

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Application

2001108920/02, 2001-04-04

(24)

Start date

2001-04-04

(22)

Actual filing date

2001-04-04

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Published

2003-06-27

(72)

Inventor

Saf'Janov A.V.Fedorov A.A.Lapin L.I.Ignat'Ev V.V.Nenakhov S.V.Spiridonov G.I.Golovinov V.A.

(73)

Holder

Oao Truboprokatnyj Zavod"

METHOD FOR MAKING SEAMLESS HOT ROLLED LARGE-DIAMETER TUBES AT HIGH ACCURACY OF WALL IN TUBE ROLLING LINES WITH PILGER MILLS Russian patent published in 2003 - IPC

Abstract RU 2207200 C2

FIELD: tube rolling production, possibly manufacture of seamless hot rolled tubes in lines with pilger mills of alloyed and high-alloy steels and alloys. SUBSTANCE: method comprises steps of rolling for reducing sleeve to tube blank at elongation factor 1.05 ≤μ≤ 1.15 in roll grooved pass at separated rolls and at increased feed rate; then rolling blank to predetermined diameter tube in designed roll grooved pass at bringing rolls together. EFFECT: manufacture of quality wall-thickness tubes of alloyed and high-alloy steels and alloys from curved and different wall thickness (rejected) sleeves, production of tubes with high-accuracy wall thickness from high-quality sleeves.

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RU 2 207 200 C2

Authors

Saf'Janov A.V.

Fedorov A.A.

Lapin L.I.

Ignat'Ev V.V.

Nenakhov S.V.

Spiridonov G.I.

Golovinov V.A.

Dates

2003-06-27—Published

2001-04-04—Filed

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