Tempering behavior of a low nitrogen boron-added 9%Cr steel

Fedorova, Irina; Kostka, Aleksander; Tkachev, E.; Belyakov, Andrey; Kaibyshev, Rustam

doi:10.1016/j.msea.2016.03.092

Item

ITEM ACTIONSEXPORT

Add to Basket

Local TagsRelease HistoryDetailsSummary

Released

Journal Article

Tempering behavior of a low nitrogen boron-added 9%Cr steel

MPS-Authors

/persons/resource/persons136719

Fedorova, Irina
Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society;
Belgorod State University, 308015 Belgorod, Russia;

/persons/resource/persons125233

Kostka, Aleksander
Center for Interface-Dominated High Performance Materials (ZGH), Ruhr-Universität Bochum, 44780 Bochum, Germany;
High-Temperature Materials, External Max Planck Fellow, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society;

External Resource

No external resources are shared

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

Fulltext (public)

There are no public fulltexts stored in PuRe

Supplementary Material (public)

There is no public supplementary material available

Citation

Fedorova, I., Kostka, A., Tkachev, E., Belyakov, A., & Kaibyshev, R. (2016). Tempering behavior of a low nitrogen boron-added 9%Cr steel. Materials Science and Engineering A: Structural Materials Properties Microstructure and Processing, 662, 443-455. doi:10.1016/j.msea.2016.03.092.

Cite as: https://hdl.handle.net/21.11116/0000-0001-B976-A

Abstract

The effect of tempering temperature on microstructure and mechanical properties was studied in a low-nitrogen, high-boron, 9Cr steel. After normalizing and low-temperature tempering, cementite platelets precipitated within the martensitic matrix. This phase transformation has no distinct effect on mechanical properties. After tempering at 500 °C, M23C6 carbides appeared in the form of layers and particles with irregular shapes along the high-angle boundaries. Approximately, 6 of the retained austenite was observed after normalizing, which reduced to 2 after tempering at 550 °C. This is accompanied by reduction in toughness from 40 J/cm2 to 8.5 J/cm2. Further increase of the tempering temperature led to spheroidization and coagulation of M23C6 particles that is followed by a significant increase in toughness to 250 J/cm2 at 750 °C. Three-phase separations of M(C,N) carbonitrides to particles enriched with V, Nb and Ti were detected after high-temperature tempering. © 2016 Elsevier B.V.