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2 471 878

(13)

(51)

IPC

C21D9/22(2006-01-01)

C21D1/46(2006-01-01)

(21) (22)

Application

2012100127/02, 2012-01-10

(24)

Start date

2012-01-10

(22)

Actual filing date

2012-01-10

(45)

Published

2013-01-10

(72)

Inventor

Afonin Boris VladimirovichVelikolug Aleksandr MikhajlovichVoronin Pavel VjacheslavovichVoronin Roman Pavlovich

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo Im. V.A. Degtjareva"

METHOD OF THERMAL TREATMENT OF HEADS AND HEAVY-LOAD DIES Russian patent published in 2013 - IPC C21D9/22 C21D1/46

Abstract RU 2471878 C1

FIELD: metallurgy.

SUBSTANCE: first, tool is heated in furnace to 500-550°C and, then, to 800-850°C in salt bath. Final heating of the tool is performed to 1030±10°C in salt bath and kept thereat at 20-25 s/mm to ensure grain high rank. After heating, the tool is cooled to 350-370°C in saltpeter bath for 30 minutes and finally cooled in oil by compressed air. Now, one-pass tempering is performed to 220-240°C.

EFFECT: higher durability.

1 ex

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RU 2 471 878 C1

Authors

Afonin Boris Vladimirovich

Velikolug Aleksandr Mikhajlovich

Voronin Pavel Vjacheslavovich

Voronin Roman Pavlovich

Dates

2013-01-10—Published

2012-01-10—Filed