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1 064 629

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A1

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IPC

(21) (22)

Application

3312476/02, 1981-06-30

(22)

Actual filing date

1981-06-30

(45)

Published

1997-05-20

(72)

Inventor

Spektor Ja.I.Burdasova T.A.Smirnov A.M.Artem'Eva V.P.Marmer Eh.N.Vislobokov V.I.

METHOD OF STEEL PIECES THERMAL TREATMENT Russian patent published in 1997 - IPC

Abstract SU 1064629 A1

FIELD: metallurgy. SUBSTANCE: method provides for steel pieces heating up to 800 - 850 C in vacuum of 10-3 - 10-5 mmHg, final heating up to gardening temperature and holding under pressure change by pumping-n argon to 10-2 mmHg and hardening in oil under pressure. Hardening is exercised under pressure of 8 - 760 mmHg. Heating from temperature of 800 - 850 C till hardening temperature is carried out under pressure of 10-2 mmHg. During hardening operation pressure is achieved by argon introduction 5 - 10 minutes before pieces dipping into oil. EFFECT: full steel hardening is achieved, increased corrosion-resistance of steel pieces surface.

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SU 1 064 629 A1

Authors

Spektor Ja.I.

Burdasova T.A.

Smirnov A.M.

Artem'Eva V.P.

Marmer Eh.N.

Vislobokov V.I.

Dates

1997-05-20—Published

1981-06-30—Filed

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