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2 175 986

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IPC

(21) (22)

Application

2000107374/02, 2000-03-28

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Start date

2000-03-28

(22)

Actual filing date

2000-03-28

(45)

Published

2001-11-20

(72)

Inventor

Trajno A.I.Pimenov A.F.Bakhtarov G.L.Borodin Ju.V.Kartashov V.I.Sarychev I.S.Kruglov A.V.

(73)

Holder

Institut Metallurgii I Materialovedenija Im. A.A. Bajkova Ran

METHOD OF HEAT TREATMENT OF TUBE CENTRIFUGALLY CAST FROM HIGH-STRENGTH CAST IRON WITH GLOBULAR GRAPHITE Russian patent published in 2001 - IPC

Abstract RU 2175986 C1

FIELD: ferrous metallurgy; heat treatment for annealing of centrifugally cast tubes. SUBSTANCE: method consists in heating to annealing temperature of 840 to 870 C and keeping at this temperature for 1-2 hours followed by specified cooling. Rate of heating the tube ranges from 4 to 40 C/min and specified cooling is effected at rate of 0.5 to 10 C from annealing temperature to temperature of 690-730 C after which cooling is completed in air any rate. EFFECT: improved quality of tube due to enhanced mechanical properties and deformability. 1 tbl

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RU 2 175 986 C1

Authors

Trajno A.I.

Pimenov A.F.

Bakhtarov G.L.

Borodin Ju.V.

Kartashov V.I.

Sarychev I.S.

Kruglov A.V.

Dates

2001-11-20—Published

2000-03-28—Filed