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2 200 201

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IPC

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Application

2001107618/02, 2001-03-21

(24)

Start date

2001-03-21

(22)

Actual filing date

2001-03-21

(45)

Published

2003-03-10

(72)

Inventor

Okolovich G.A.Evtushenko A.T.Okhrimenko S.A.Semenchina A.S.

(73)

Holder

Altajskij Gosudarstvennyj Tekhnicheskij Universitet Im. I.I. Polzunova

METHOD FOR SECONDARY HARDNESS THERMAL TREATMENT OF HIGH-CHROMIUM TOOL STEEL Russian patent published in 2003 - IPC

Abstract RU 2200201 C2

FIELD: metallurgy. SUBSTANCE: method involves providing initial steel quenching at temperature of 1,070-1,080 C with following intermediate tempering at temperature of 400-420 C for 1 hour and final multiple tempering at temperature of 520-540 C, in particular, triple tempering for 1 hour each tempering cycle. Method is used for processing of high-chromium steel for manufacture of tools and parts of machines. EFFECT: increased service life of tools manufactured from such steel due to increased secondary hardness and strength. 2 cl, 1 tbl

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RU 2 200 201 C2

Authors

Okolovich G.A.

Evtushenko A.T.

Okhrimenko S.A.

Semenchina A.S.

Dates

2003-03-10—Published

2001-03-21—Filed

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