METHOD OF FABRICATION OF SEAMLESS HOT-ROLLED PIPES 530(17-60, 550(25-60, 610(32-50 AND 630(32-60 MM OUT OF FORGED, CONTINUOUSLY CAST BILLETS, INGOTS AND HOLLOW INGOTS OF ELECTROSLAG REMELTING PROCESS AT PIPE-ROLLING UNIT 8-16" WITH PILGER MILLS OF JSC CHTPZ Russian patent published in 2015 - IPC B21B21/00 

Abstract RU 2550035 C2

FIELD: metallurgy.

SUBSTANCE: method includes drilling in the billets of the through hole with diameter 100±5 mm, heating to temperature of mouldability, piercing at the helical rolling mill to hollow thick-wall shells with rise along diameter, heating of thick-wall shells from cold or hot fit to temperature of mouldability, piercing-rolling at helical rolling mill of the thick-wall shells, rolling of thin-wall shells to said pipes at Pilger mills. Billets length for piercing is specified by the mathematical expression.

EFFECT: lower metal input, higher precision of pipe wall and diameter sizes.

4 cl, 1 tbl

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RU 2 550 035 C2

Authors

Saf'Janov Anatolij Vasil'Evich

Fedorov Aleksandr Anatol'Evich

Tazetdinov Valentin Irekleevich

Osadchij Vladimir Jakovlevich

Shmakov Evgenij Jur'Evich

Klimov Nikolaj Petrovich

Matjushin Aleksandr Jur'Evich

Bubnov Konstantin Ehduardovich

Saf'Janov Aleksandr Anatol'Evich

Dates

2015-05-10Published

2013-06-28Filed