2019-4 (33)

Design, manufacturing and commissioning of nuclear industry equipment

Article Name10.26583/GNS-2019-04-03
Liquation Heterogeneity and Weldability of 10GN2MFA Steel
AuthorsE.I. Kolokolov*1, S.A. Tomilin*2, M.E. Zhidkov **3
Address

*Volgodonsk Engineering Technical Institute the branch of National Research Nuclear University «MEPhI»,

Lenin St., 73/94, Volgodonsk, Rostov region, Russia 347360

** “Atommash” branch of “AEM Technologies” JSC in Volgodonsk, Volgodonsk, Rostov Region, Russia

1 ORCID iD: 0000-0003-2134-3638

e-mail: E.I.Kolokolov@yandex.ru

2ORCID iD: 0000-0001-8661-8386

Wos Researher ID: G-3465-2017

e-mail: SATomilin@mephi.ru

3e-mail: Zhidkov_ME@atommash.ru

AbstractThe article shows that the segregation heterogeneity inherent in 10GN2MFA steel preforms causes the formation of sections enriched with alloying elements, impurities and nonmetallic inclusions, which leads to a pronounced structural heterogeneity and different tendency to recrystallize during pressure treatment, the formation of quenching structures, and hot cracks in the heat affected zones during the execution of the outer rollers during automatic submerged arc welding. Such behavior can also appears in the weld metal with increased heat input, and other deviations in technology that cause the formation of a large dendrite structure.
Keywordssegregation heterogeneity, steel weldability, thermokinetic diagram, bainite, martensitic-austenitic component, hot microcracks of segregation origin, a tendency to recrystallization during metal forming.
LanguageRussian
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