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Metals 2019, 9(2), 218; https://doi.org/10.3390/met9020218

Microstructure and Hot Deformation Behaviour of a Novel Zr-Alloyed High-Boron Steel

1
National University of Science and Technology “MISiS”, Leninskiy Prospekt 4, 119049 Moscow, Russia
2
French electricity supplier “EDF”, 86320 Civaux, France
*
Author to whom correspondence should be addressed.
Received: 14 January 2019 / Revised: 4 February 2019 / Accepted: 8 February 2019 / Published: 12 February 2019
(This article belongs to the Special Issue Manufacturing and Application of Stainless Steels)
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Abstract

A novel corrosion-resistant steel with high boron content is investigated in this paper. Three stages during crystallisation of the steel are revealed. The positive influence of Zr addition on the microstructure and mechanical properties after hot deformation is shown. The Zr-alloyed steel demonstrates hot deformation without fracturing in the temperature range of 1273–1423 K, and in the strain rate range of 0.1–10 s−1, despite the high volume of brittle borides. The processes of ferrite recrystallisation and boride structure fragmentation occur during hot deformation, promoting the appearance of a peak on stress–strain curves. View Full-Text
Keywords: high-boron steel; high-speed steel; hot deformation; mechanical properties; borides high-boron steel; high-speed steel; hot deformation; mechanical properties; borides
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Prosviryakov, A.; Mondoloni, B.; Churyumov, A.; Pozdniakov, A. Microstructure and Hot Deformation Behaviour of a Novel Zr-Alloyed High-Boron Steel. Metals 2019, 9, 218.

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