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(19)

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2 464 326

(13)

(51)

IPC

C21D9/08(2006-01-01)

C21D8/10(2006-01-01)

C21D1/28(2006-01-01)

(21) (22)

Application

2011130060/02, 2011-07-19

(24)

Start date

2011-07-19

(22)

Actual filing date

2011-07-19

(45)

Published

2012-10-20

(72)

Inventor

Serebrjakov Andrej Vasil'EvichChikalov Sergej Gennad'EvichLadygin Sergej AleksandrovichPrilukov Sergej BorisovichBochkareva Larisa Valer'EvnaSerebrjakov Aleksandr Vasil'EvichParshakov Stanislav Ivanovich

(73)

Holder

Oao Novotrubnyj Zavod"

HEAT TREATMENT METHOD OF COLD DEFORMED PIPES Russian patent published in 2012 - IPC C21D9/08 C21D8/10 C21D1/28

Abstract RU 2464326 C1

FIELD: metallurgy.

SUBSTANCE: normalisation is performed at temperature of 960°-970°C during 30-50 minutes, cooling is performed in the air, drawing is performed at 760°-770°C with exposure at that temperature during 60-80 minutes, and cooling is performed to 680°C with furnace during 50-70 minutes with final cooling in the air.

EFFECT: providing stability of yield strength values, which will allow improving the quality of pipes and operating reliability and lifetime of steam generator; performing the heat treatment including pipe normalisation and drawing operations.

6 ex, 1 tbl, 3 dwg

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RU 2 464 326 C1

Authors

Serebrjakov Andrej Vasil'Evich

Chikalov Sergej Gennad'Evich

Ladygin Sergej Aleksandrovich

Prilukov Sergej Borisovich

Bochkareva Larisa Valer'Evna

Serebrjakov Aleksandr Vasil'Evich

Parshakov Stanislav Ivanovich

Dates

2012-10-20—Published

2011-07-19—Filed