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2 412 032

(13)

(51)

IPC

B23K9/16(2006-01-01)

B23K26/20(2006-01-01)

B23K101/06(2006-01-01)

(21) (22)

Application

2009137210/02, 2009-10-08

(24)

Start date

2009-10-08

(22)

Actual filing date

2009-10-08

(45)

Published

2011-02-20

(72)

Inventor

Grinin Oleg IvanovichKuznetsov Andrej VladimirovichLopota Aleksandr Vital'EvichPevzner Jakov BorisovichTurichin Gleb AndreevichTsibul'Skij Igor' Aleksandrovich

(73)

Holder

Obshchestvo S Ogranichennoj Otvetstvennost'Ju Lazernykh Tekhnologij"

METHOD OF WELDING BUTTS OF LONGITUDINAL WELDED TUBES FROM HIGH-STRENGTH STEELS Russian patent published in 2011 - IPC B23K9/16 B23K26/20 B23K101/06

Abstract RU 2412032 C1

FIELD: process engineering.

SUBSTANCE: invention may be used for welding longitudinal seams of large-diametre tubes from high-strength steels in construction of main pipelines, field and sea pipelines of oil and gas industry. X-grooved outer seam is laser-arc welded by consumable electrode in pulse-intermittent conditions. Arc pulsation frequency coincides with laser pulse frequency and makes 380-420 Hz. Thereafter, inner seam is welded in one pass in atmosphere of protective gas or under flux layer.

EFFECT: possibility to weld thick-wall tubes with high strength and quality properties.

2 dwg, 2 tbl

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RU 2 412 032 C1

Authors

Grinin Oleg Ivanovich

Kuznetsov Andrej Vladimirovich

Lopota Aleksandr Vital'Evich

Pevzner Jakov Borisovich

Turichin Gleb Andreevich

Tsibul'Skij Igor' Aleksandrovich

Dates

2011-02-20—Published

2009-10-08—Filed