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Effect of Prior Boriding on Microstructure and Mechanical Properties of Nanobainitic X37CrMoV5-1 Hot-Work Tool Steel

The influence of prior pack boriding on the microstructure and properties of nanobainitised X37CrMoV5-1 hot-work tool steel was investigated in the present work. Pack boriding was conducted at 950 °C for 4 h. Nanobainitising consisted of two-step isothermal quenching at 320 °C for 1 h, followed by a...

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Autores principales: Łukaszewicz, Grzegorz, Tacikowski, Michał, Kulka, Michał, Chmielarz, Krzysztof, Węsierska-Hinca, Monika, Świątnicki, Wiesław A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10305558/
https://www.ncbi.nlm.nih.gov/pubmed/37374421
http://dx.doi.org/10.3390/ma16124237
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author Łukaszewicz, Grzegorz
Tacikowski, Michał
Kulka, Michał
Chmielarz, Krzysztof
Węsierska-Hinca, Monika
Świątnicki, Wiesław A.
author_facet Łukaszewicz, Grzegorz
Tacikowski, Michał
Kulka, Michał
Chmielarz, Krzysztof
Węsierska-Hinca, Monika
Świątnicki, Wiesław A.
author_sort Łukaszewicz, Grzegorz
collection PubMed
description The influence of prior pack boriding on the microstructure and properties of nanobainitised X37CrMoV5-1 hot-work tool steel was investigated in the present work. Pack boriding was conducted at 950 °C for 4 h. Nanobainitising consisted of two-step isothermal quenching at 320 °C for 1 h, followed by annealing at 260 °C for 18 h. A combination of boriding with nanobainitising constituted a new hybrid treatment. The obtained material exhibited a hard borided layer (up to 1822 ± 226 HV0.05) and a strong (rupture strength 1233 ± 41 MPa) nanobainitic core. However, the presence of a borided layer decreased mechanical properties under tensile and impact load conditions (total elongation decreased by 95% and impact toughness by 92%). Compared with borided and conventionally quenched and tempered steel, the hybrid–treated material retained higher plasticity (total elongation higher by 80%) and higher impact toughness (higher by 21%). It was found that the boriding led to the redistribution of carbon and silicon atoms between the borided layer and substrate, which could influence bainitic transformation in the transition zone. Furthermore, the thermal cycle in the boriding process also influenced the phase transformations during subsequent nanobainitising.
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spelling pubmed-103055582023-06-29 Effect of Prior Boriding on Microstructure and Mechanical Properties of Nanobainitic X37CrMoV5-1 Hot-Work Tool Steel Łukaszewicz, Grzegorz Tacikowski, Michał Kulka, Michał Chmielarz, Krzysztof Węsierska-Hinca, Monika Świątnicki, Wiesław A. Materials (Basel) Article The influence of prior pack boriding on the microstructure and properties of nanobainitised X37CrMoV5-1 hot-work tool steel was investigated in the present work. Pack boriding was conducted at 950 °C for 4 h. Nanobainitising consisted of two-step isothermal quenching at 320 °C for 1 h, followed by annealing at 260 °C for 18 h. A combination of boriding with nanobainitising constituted a new hybrid treatment. The obtained material exhibited a hard borided layer (up to 1822 ± 226 HV0.05) and a strong (rupture strength 1233 ± 41 MPa) nanobainitic core. However, the presence of a borided layer decreased mechanical properties under tensile and impact load conditions (total elongation decreased by 95% and impact toughness by 92%). Compared with borided and conventionally quenched and tempered steel, the hybrid–treated material retained higher plasticity (total elongation higher by 80%) and higher impact toughness (higher by 21%). It was found that the boriding led to the redistribution of carbon and silicon atoms between the borided layer and substrate, which could influence bainitic transformation in the transition zone. Furthermore, the thermal cycle in the boriding process also influenced the phase transformations during subsequent nanobainitising. MDPI 2023-06-07 /pmc/articles/PMC10305558/ /pubmed/37374421 http://dx.doi.org/10.3390/ma16124237 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Łukaszewicz, Grzegorz
Tacikowski, Michał
Kulka, Michał
Chmielarz, Krzysztof
Węsierska-Hinca, Monika
Świątnicki, Wiesław A.
Effect of Prior Boriding on Microstructure and Mechanical Properties of Nanobainitic X37CrMoV5-1 Hot-Work Tool Steel
title Effect of Prior Boriding on Microstructure and Mechanical Properties of Nanobainitic X37CrMoV5-1 Hot-Work Tool Steel
title_full Effect of Prior Boriding on Microstructure and Mechanical Properties of Nanobainitic X37CrMoV5-1 Hot-Work Tool Steel
title_fullStr Effect of Prior Boriding on Microstructure and Mechanical Properties of Nanobainitic X37CrMoV5-1 Hot-Work Tool Steel
title_full_unstemmed Effect of Prior Boriding on Microstructure and Mechanical Properties of Nanobainitic X37CrMoV5-1 Hot-Work Tool Steel
title_short Effect of Prior Boriding on Microstructure and Mechanical Properties of Nanobainitic X37CrMoV5-1 Hot-Work Tool Steel
title_sort effect of prior boriding on microstructure and mechanical properties of nanobainitic x37crmov5-1 hot-work tool steel
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10305558/
https://www.ncbi.nlm.nih.gov/pubmed/37374421
http://dx.doi.org/10.3390/ma16124237
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