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Rostov-na-Donu, Russia

Korol' A.V.,OAO RosNITI | Zvonarev D.Y.,OAO RosNITI | Kuryatnikov A.V.,OAO RosNITI | Khudyakov N.K.,OAO RosNITI | Sapunov S.Y.,OAO TAGMET
Steel in Translation

The most significant factors determining the wear resistance of mandrels in the Disher piercing mill at OAO Tagmet are identified: the resulting sleeve length, the mandrel size, the deformation conditions, and the machine time for piercing. Rather than any one of these factors, their combination has the greatest influence on the wear resistance of the mandrels. © 2011 Allerton Press, Inc. Source

Suvorov V.I.,OAO RosNITI | Mozzhegorov M.N.,OAO RosNITI | Pyatkov V.L.,OAO Severskii Trubnyi Zavod | Pluzhnikov N.S.,OAO TAGMET
Steel in Translation

Attention focuses on improvements in the calculation of the basic roller-groove parameters and the selection of an optimal configuration in converting the strip into pipe. The basic characteristics of pipe-electrowelding systems are presented. The influence of the shaping system and the configuration of the equipment on the energy parameters of pipe rolling is investigated. To reduce the number of driven shaping cells in the mill from 8-10 to four, recommendations are made regarding the grooving system and the mill composition. To this end, shaping along the descending trajectory of the lower generatrix is also recommended. © 2011 Allerton Press, Inc. Source

Mul'chin V.V.,OAO TAGMET | Vydrin A.V.,OAO RosNITI | Korol' A.V.,OAO RosNITI | Kuryatnikov A.V.,OAO RosNITI | Zinchenko A.V.,OAO TAGMET
Steel in Translation

A method is proposed for determining the basic adjustment for piercing on a rotary rolling mill with driven guide disks. Formulas are derived for the distance between the guide disks as a function of the piercing conditions. © 2010 Allerton Press, Inc. Source

Mikhailov S.M.,OAO TAGMET | Mul'chin V.V.,OAO TAGMET | Sapunov S.Y.,OAO TAGMET | Shifrin E.I.,OAO TMK
Steel in Translation

Technology for seamless-pipe production on a continuous mill with three-roller cells has been introduced at OAO Tagmet. The mill is equipped with an automatic control system and an automatic system for monitoring and correction of the technological parameters. The major benefits of the new technology are considered. © 2011 Allerton Press, Inc. Source

Mul'chin V.V.,OAO TAGMET | Farshutnyi R.N.,OAO TAGMET | Yasaev R.A.,OAO TAGMET | Koz'ev V.G.,OAO TAGMET | And 2 more authors.
Russian Journal of Nondestructive Testing

The structural scheme of an automatic system for nondestructive testing of seamless pipes in the technological line of their production is considered. The integrated use of ultrasonic and eddy-current inspection methods reduced the number of missed flaws and overrejected pipes to a minimum. The refined calculation of the scanning step and turn angle of roll-table wheels is presented. The minimum reliably detectable area of the discrepancy between the wall thickness of a pipe and specified tolerances is calculated. The obtained calculation formulas make it possible to optimize the scanning step and increase the efficiency of inspection by 15.0%. © Allerton Press, Inc., 2010. Source

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