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2 128 233

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IPC

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Application

98106734/02, 1998-04-07

(22)

Actual filing date

1998-04-07

(45)

Published

1999-03-27

(72)

Inventor

Nemzer N.A.Nemzer G.G.Lukanin Ju.V.Stepanov A.A.Abramenko V.I.Smirnov V.S.

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo

PROCESS OF THERMAL IMPROVEMENT OF ROLLS Russian patent published in 1999 - IPC

Abstract RU 2128233 C1

FIELD: thermal treatment, intermediate or final thermal treatment of sheet-rolling working and back-up rolls made of chromium-molybdenum-vanadium steels. SUBSTANCE: process involves hardening of rolls to temperatures of 850-950 C with regulated cooling and subsequent tempering. Cooling is conducted by supply of water and air mixture to surface of roll barrel with specific consumption of water between 1.6-2.0 kg/sq.m s and duration of period of supply found from calculation of 0.3-2.7 s/mm of barrel diameter. After this specific consumption is decreased to 0.1-0.2 kg/sq.m s and cooling of roll is finished. EFFECT: enhanced operational resistance of rolls. 1 tbl

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RU 2 128 233 C1

Authors

Nemzer N.A.

Nemzer G.G.

Lukanin Ju.V.

Stepanov A.A.

Abramenko V.I.

Smirnov V.S.

Dates

1999-03-27—Published

1998-04-07—Filed

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