Authors & Affiliations
Logashov S.U., Orlov A.S., Gavrilov E.V., Khaymin S.V.
Joint Stock Company “Research Production Association “Central Research Institute of Machine Building Technology”, Moscow, Russia
Logashov S.U. – Head of Laboratory of Corrosion-Resistance Steels and Alloys, Joint Stock Company “Research Production Association “Central Research Institute of Machine Building Technology”. Contacts: 4, Sharikopodshipnikovskaya st., Moscow, Russia, 115088. Tel.: (495) 675-85-42 (25-42); e-mail:
Orlov A.S. – Deputy Director of the Materials Science Institute, Joint Stock Company “Research Production Association “Central Research Institute of Machine Building Technology”.
Gavrilov E.V. – Senior Researcher, Joint Stock Company “Research Production Association “Central Research Institute of Machine Building Technology”.
Khaymin S.V. – Head of the Central Testing Laboratory, Joint Stock Company “Research Production Association “Central Research Institute of Machine Building Technology”.
Abstract
The aim of this development was to obtain the insufficient data necessary to justify service characteristics used in the evaluation of the strength, safety and lifetime of seamless hot-formed pipes of 09Mn2Si steel and their welded joints intended for the construction of structural elements of the reactor vessel heating system BREST-OD-300.
Within the framework of the work, the test program "Testing for the justification of the application of pipes of 09Mn2Si steel for elements of reactor vessel heating system BREST" was developed and agreed upon.
For testing under the developed program, a representative lot of seamless hot-formed pipes from 09Mn2Si steel of the same standard sizes, made according to the same normative documents and as pipes intended for the structural elements of the reactor vessel heating system BREST-OD-300, was purchased. The samples required by the Test Program were manufactured from representative lot of pipes of steel 09Mn2Si and homogeneous welded joints.
Within the framework of this development, JSC "RPA CNIITMASH" carried out tests for creep-rupture strength on a limited time base. The experimental data were processed by the Trunin method and curves of creep-rupture strength were plotted. And the preliminary values of creep-rupture strength limits (RTmt) of pipes metal and welded joints were determined.
Considering the large scale formation, obtained values for creep-rupture strength limits are approximate. And based on obtained values, critical temperature of 09Mn2Si steel pipes can be determined.
Based on the results of the development, it is possible to draw conclusions about continuation of research to justify the strength, safety and lifetime of structural elements material of the reactor vessel heating system BREST-OD-300.
Keywords
09Mn2Si steel, welded joints, creep-rupture strength, creep test, heat resistance, BREST-OD-300
UDC 621.039.5