Regularities of structure modification of 09Mn2Si steel rod at helical rolling and its influence on impact toughness

I. V. Vlasov, N. S. Surikova, I. P. Mishin, S. V. Panin, A. S. Smirnova, A. V. Yakovlev

Результат исследований: Материалы для книги/типы отчетовМатериалы для конференции

Аннотация

Effect of structure modification induced by the helical rolling on the impact toughness of 09Mn2Si steel was studied. A metallographic structural analysis of the steel in the as-received state as well as after the helical rolling (HR) was carried out. It was revealed that the five-stage combined thermal-mechanical treatment results in ferrite grains refinement, formation of rolling texture at the depth of up to 1 mm, while ultrafine grained structure is formed in the surface layer. This is accompanied by a gradient hardening pattern over the rod's cross-section as evidenced from microhardness measurements. Mechanical properties were assessed through impact bending tests. It is shown that helical rolling gives rise to increasing fracture toughness of the rolled specimens in the entire testing temperature range (-70 ÷ +20 °C). The maximum two-fold increase of impact toughness is registered at the testing temperature of -70 °C. Authors suggest that the main reason for this increase is formation of a gradient fiber-like structure. The latter ensures effective arresting of the main crack growth during the impact bending.

Язык оригиналаАнглийский
Название основной публикацииProceedings of the International Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2019
РедакторыVictor E. Panin, Sergey G. Psakhie, Vasily M. Fomin
ИздательAmerican Institute of Physics Inc.
ISBN (электронное издание)9780735419124
DOI
СостояниеОпубликовано - 19 ноя 2019
СобытиеInternational Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2019 - Tomsk, Российская Федерация
Продолжительность: 1 окт 20195 окт 2019

Серия публикаций

НазваниеAIP Conference Proceedings
Том2167
ISSN (печатное издание)0094-243X
ISSN (электронное издание)1551-7616

Конференция

КонференцияInternational Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2019
СтранаРоссийская Федерация
ГородTomsk
Период1.10.195.10.19

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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  • Цитировать

    Vlasov, I. V., Surikova, N. S., Mishin, I. P., Panin, S. V., Smirnova, A. S., & Yakovlev, A. V. (2019). Regularities of structure modification of 09Mn2Si steel rod at helical rolling and its influence on impact toughness. В V. E. Panin, S. G. Psakhie, & V. M. Fomin (Ред.), Proceedings of the International Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2019 [020383] (AIP Conference Proceedings; Том 2167). American Institute of Physics Inc.. https://doi.org/10.1063/1.5132250