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(11)

2 520 286

(13)

(51)

IPC

C21D6/02(2006-01-01)

C21D1/25(2006-01-01)

(21) (22)

Application

2013113076/02, 2013-03-22

(24)

Start date

2013-03-22

(22)

Actual filing date

2013-03-22

(45)

Published

2014-06-20

(72)

Inventor

Kajbyshev Rustam OskarovichKipelova Alla Jur'Evna

(73)

Holder

Federal'Noe Gosudarstvennoe Avtonomnoe Obrazovatel'Noe Uchrezhdenie Vysshego Professional'Nogo Obrazovanija Gosudarstvennyj Natsional'Nyj Issledovatel'Skij Universitet"

HEAT PROCESSING OF REFRACTORY MARTENSITE STEELS Russian patent published in 2014 - IPC C21D6/02 C21D1/25

Abstract RU 2520286 C1

FIELD: metallurgy.

SUBSTANCE: proposed method comprises holding in austenite region at 1060°C for 30-40 min with subsequent air cooling two-step tempering. At first step, low-temperature tempering is performed at 200-350°C while at second step it is performed at 760°C. Every tempering takes 3 hours.

EFFECT: higher long-term strength and creep limit.

4 tbl, 1 ex

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RU 2 520 286 C1

Authors

Kajbyshev Rustam Oskarovich

Kipelova Alla Jur'Evna

Dates

2014-06-20—Published

2013-03-22—Filed