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2 044 801

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IPC

(21) (22)

Application

4886912/02, 1990-12-04

(22)

Actual filing date

1990-12-04

(45)

Published

1995-09-27

(72)

Inventor

Fuks-Rabinovich G.S.Kuznetsov A.N.Tikhonychev V.V.Moiseev V.F.Bogomolov V.G.Shaurova N.K.Kuz'Mina N.V.

(73)

Holder

Moskovskij Gosudarstvennyj Tekhnologicheskij Universitet

METHOD FOR THERMOCHEMICAL TREATMENT Russian patent published in 1995 - IPC

Abstract RU 2044801 C1

FIELD: metallurgy; applicable in mechanical engineering. SUBSTANCE: blanking dies of high-chromium die steels are subjected to nitriding in glow discharge with combined heating at pressure of 2-3 mm Hg, temperature of working edge of 430-480 C, ion current density of 0,3 mА/сm², and duration of 2-4 h. Additional heating in vacuum or nitrogen-containing atmosphere is conducted directly after nitriding at temperature higher than that during nitriding but not exceeding temperature of material loss of strength. EFFECT: higher efficiency. 1 tbl

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RU 2 044 801 C1

Authors

Fuks-Rabinovich G.S.

Kuznetsov A.N.

Tikhonychev V.V.

Moiseev V.F.

Bogomolov V.G.

Shaurova N.K.

Kuz'Mina N.V.

Dates

1995-09-27—Published

1990-12-04—Filed