METHOD FOR THERMAL TREATMENT OF WELDED JOINT ZONE OF DRILLING PIPES

FIELD: metallurgy.SUBSTANCE: to provide strength of welded joint zone of drilling pipes, method involves tempering of welded joint by heating with currents of medium frequency to temperature of 400-450 °C with holding for at least 60 seconds and cooling in calm air, as well as subsequent hardening b...

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Hauptverfasser:	Kuzmina Elena Aleksandrovna, Atamashkin Artem Sergeevich, Krivov Stepan Aleksandrovich, Priimak Elena Iurevna, Stepanchukova Anna Viktorovna, Medvedev Aleksandr Konstantinovich, Tulibaev Egor Sagitovich
Format:	Patent
Sprache:	eng ; rus
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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