METHOD OF PIPE MANUFACTURE

FIELD: metallurgy; mainly, manufacture of oil-and gas pipes from low-carbon steel resistant to corrosion cracking in media containing hydrogen sulfide and carbon dioxide. SUBSTANCE: method includes preliminarily hot-rolling, cooling, heating, final rolling, heating up to 760-790 C, cooling in water...

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Bibliographische Detailangaben
Hauptverfasser:	POPOVTSEV JU.A, GALICHENKO E.N, PROKHOROV N.N, GREKHOV A.I, ZHUKOV A.I, MARCHENKO L.G, BODROV JU.V, BRIZHAN A.I, ZHUKOVA S.JU, TETJUEVA T.V, MEDVEDEV A.P, SHEPELEV A.V
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS
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Beschreibung
Zusammenfassung:	FIELD: metallurgy; mainly, manufacture of oil-and gas pipes from low-carbon steel resistant to corrosion cracking in media containing hydrogen sulfide and carbon dioxide. SUBSTANCE: method includes preliminarily hot-rolling, cooling, heating, final rolling, heating up to 760-790 C, cooling in water and tempering. Cooling of pipes after preliminary hot-rolling is carried out in the air down to temperature of 600-650 C, and with this temperature, pipes are heated up to 850-900 C for final rolling. Then pipes are cooled in the air, and after hardening, tempering is carried out at temperature of 690-720 C. EFFECT: higher efficiency. 1 tble