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2 599 465

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IPC

C21D1/25(2006-01-01)

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Application

2015108477/02, 2015-03-11

(24)

Start date

2015-03-11

(22)

Actual filing date

2015-03-11

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Published

2016-10-10

(72)

Inventor

Ilichev Andrej VyacheslavovichOvchinnikov Dmitrij VladimirovichTikhontseva Nadezhda TakhirovnaZhukova Svetlana YulevnaLefler Mikhail NoekhovichSofrygina Olga AndreevnaKorchagina Irina Viktorovna

(73)

Holder

Publichnoe Aktsionernoe Obshshestvo Trubnyj Zavod"

METHOD OF CHROME-MOLYBDENUM STEEL ARTICLES HEAT TREATMENT Russian patent published in 2016 - IPC C21D1/25

Abstract RU 2599465 C2

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, namely to a method of thermal treatment of items from low-carbon chrome-molybdenum steel and can be used for hardening of oil pipes, for example, tubing and casing. To obtain articles with high corrosion resistance in aggressive media containing hydrogen sulphide in compliance with international standard API Spec 5CT/ISO 11961 and carbon dioxide, and high level of strength properties (yield point of 552 to 800 MPa), article is subjected to thermal treatment, including heating for austenization to temperature of Ac₃+(50…80) °C with holding for at least of 30 minutes, cooling in water till temperature of no more than 100 °C and heating for tempering to temperature not more than (Ac₁-15) °C with holding for at least of 30 minutes.

EFFECT: heat treatment of items from low-carbon chrome-molybdenum steel.

1 cl, 1 tbl

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RU 2 599 465 C2

Authors

Ilichev Andrej Vyacheslavovich

Ovchinnikov Dmitrij Vladimirovich

Tikhontseva Nadezhda Takhirovna

Zhukova Svetlana Yulevna

Lefler Mikhail Noekhovich

Sofrygina Olga Andreevna

Korchagina Irina Viktorovna

Dates

2016-10-10—Published

2015-03-11—Filed