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Kamensk-Shakhtinskiy, Russia

Veselov I.N.,OAO RosNITI | Pyshmintsev I.Y.,OAO RosNITI | Laev K.A.,OAO RosNITI | Zhukova S.Y.,OAO Sinarskii Trubnyi Zavod
Steel in Translation | Year: 2011

The structure and mechanical properties of low-carbon microalloyed pipe steel are studied. Different heat-treatment systems permit the regulation of microstructure formation and modification of the strength. A complex structure with minimal content of acicular components is observed in the steel after quenching from the austenite region at the cooling rate typical of pipe treatment and high tempering. The best combination of structure and mechanical and corrosion properties is obtained after heat treatment that includes double quenching (first from the austenite region and then from the intercritical range) and high tempering. © 2011 Allerton Press, Inc.

Zainullin L.A.,OAO VNIIMT | Kalganov M.V.,OAO VNIIMT | Kalganov D.V.,OAO VNIIMT | Loshkarev N.B.,OAO VNIIMT | And 2 more authors.
Steel in Translation | Year: 2015

Electric heaters with radiant-convective heat transfer between the heating elements and the walls of the sealed housing are developed. Industrial tests show that intensification of the heat liberation from the coils by ventilation using a circulatory fan increases their life by 30–50% in comparison with existing devices, by reducing the temperature of the elements. The sealed housing permits their use in convective furnaces with protective or aggressive atmospheres. © 2015, Allerton Press, Inc.

Bityukov S.M.,OAO RosNITI | Laev K.A.,OAO RosNITI | Lefler M.N.,OAO Sinarskii Trubnyi Zavod | Zhukova S.Y.,OAO Sinarskii Trubnyi Zavod | Kocheshkova E.V.,OAO Sinarskii Trubnyi Zavod
Steel in Translation | Year: 2011

The temperature ranges corresponding to phase transitions in the heating and cooling of L80 steel of 13Cr type according to the API 5CT/ISO 11961 standard are determined (the Russian analog is 20X13 steel). The influence of the heat treatment on the structure and mechanical properties of the steel is investigated. It proves expedient to reduce the initial temperature in quenching from 1030-1040°C to 930-960°C, so as to improve the impact strength of the steel at negative temperatures. The influence of additional alloying of L80-13Cr steel with manganese and molybdenum on its strength and plasticity is studied. The use of steel with 13% Cr and with 1-2% nickel and manganese is promising for low-temperature pipe resistant to carbondioxide corrosion. © 2011 Allerton Press, Inc.

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