A Unique Bimodal Microstructure Induced by Ultrafine Inclusions to Improve Mechanical Properties of Low‐Carbon Steels Produced by Twin‐Roll Casting.
In: Steel Research International, Jg. 91 (2020-03-01), Heft 3, S. 1-5
Online
academicJournal
Zugriff:
A unique bimodal microstructure is proposed to improve the mechanical properties of low‐carbon steels produced by twin‐roll casting. The ultrafine inclusions (0.2–2.0 μm) are produced in the as‐cast matrix. A high proportion of ultrafine acicular ferrite (UFAF) is induced due to these inclusions by controlling the critical processing factor, i.e., the cooling rate during γ → α transformation process. Therefore, heterogeneous microstructure is characterized by UFAF cluster, and network‐like coarse polygonal ferrite (PF) with a bimodal grain size distribution is engineered, significantly increasing the strength while not obviously damaging the plasticity. In addition, a new acicular ferrite (AF) heterogeneous nucleation mechanism is reported. [ABSTRACT FROM AUTHOR]
| Titel: |
A Unique Bimodal Microstructure Induced by Ultrafine Inclusions to Improve Mechanical Properties of Low‐Carbon Steels Produced by Twin‐Roll Casting.
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| Autor/in / Beteiligte Person: | Song, Zi‐Hao ; Song, Hong‐Yu ; Liu, Hai‐Tao |
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| Zeitschrift: | Steel Research International, Jg. 91 (2020-03-01), Heft 3, S. 1-5 |
| Veröffentlichung: | 2020 |
| Medientyp: | academicJournal |
| ISSN: | 1611-3683 (print) |
| DOI: | 10.1002/srin.201900471 |
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