HARDENING MEDIUM Russian patent published in 1999 - IPC

Abstract RU 2130083 C1

FIELD: heat treatment of metals; may be used in hardening of tools from nonalloyed cast iron with ledeburite structure. SUBSTANCE: hardening medium contains, wt. %: copper vitriol, 0.4-0.3; glacial acid, 1-12; sodium chloride, 2.8-4.5; sodium nitrate, 3.0-3.6; water, the balance. EFFECT: preservation of hardening properties of medium at rising its temperature, reduced tendency for cracks formation in iron tool. 1 tbl

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RU 2 130 083 C1

Authors

Afanas'Ev V.K.

Sagalakova M.M.

Chibrjakov M.V.

Sarlin M.K.

Popova M.V.

Dates

1999-05-10—Published

1998-06-08—Filed