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2 294 261

(13)

(51)

IPC

B22F3/24(2006-01-01)

C22C29/00(2006-01-01)

(21) (22)

Application

2005118570/02, 2005-06-15

(24)

Start date

2005-06-15

(22)

Actual filing date

2005-06-15

(45)

Published

2007-02-27

(72)

Inventor

Oskolkova Tat'Jana Nikolaevna

(73)

Holder

Gosudarstvennoe Obrazovatel'Noe Uchrezhdenie Vysshego Professional'Nogo Obrazovanija Sibirskij Gosudarstvennyj Industrial'Nyj Universitet

HARD ALLOY QUENCHING METHOD Russian patent published in 2007 - IPC B22F3/24 C22C29/00

Abstract RU 2294261 C1

FIELD: powder metallurgy, namely quenching method for hard alloys on base of tungsten carbide for making drilling tools.

SUBSTANCE: method for quenching tungsten carbide base hard alloy comprises steps of heating alloy till temperature higher than 1100°C; cooling it in quenching medium; using as quenching medium 8 - 12% water solution of sodium-iron containing salt of poly-acrylic acid.

EFFECT: improved hardness of alloy, increased operational strength of tool.

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RU 2 294 261 C1

Authors

Oskolkova Tat'Jana Nikolaevna

Dates

2007-02-27—Published

2005-06-15—Filed