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2 023 025

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C1

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IPC

(21) (22)

Application

4932565/02, 1991-04-29

(22)

Actual filing date

1991-04-29

(45)

Published

1994-11-15

(72)

Inventor

Afanas'Ev V.D.Salishchev G.A.Farkhutdinov K.G.

(73)

Holder

Institut Problem Sverkhplastichnosti Metallov

METHOD OF FERRITIC STEEL THERMAL TREATMENT Russian patent published in 1994 - IPC

Abstract RU 2023025 C1

FIELD: metallurgy, production of items for operation in aggressive media at high loads. SUBSTANCE: ferritic steel workpiece is annealed at 475 C temper brittleness drawing temperature within from 1.5 to 2 h, forged at increased strain temperature within from 450 - 500 to 640 - 650 C with total strain amounted for 150 to 200 per cent. Then it is thermally treated within 565 to 580 C temperature and water cooled. EFFECT: almost full recrystallization with 1 to 3 microns medium grain size. 1 tbl

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RU 2 023 025 C1

Authors

Afanas'Ev V.D.

Salishchev G.A.

Farkhutdinov K.G.

Dates

1994-11-15—Published

1991-04-29—Filed

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