View in EDS HTML Full Text PDF Full Text

Grain refinement of Nb microalloyed steel during continuous casting under different thermal profiles.

Saved in:
Bibliographic Details
Title: Grain refinement of Nb microalloyed steel during continuous casting under different thermal profiles.
Authors: Zhou, Zhongqi1,2 (AUTHOR), Li, Xinyu1,2 (AUTHOR), Meng, Xiangning1,2 (AUTHOR) mengxn@mail.neu.edu.cn, Sheng, Yuewei1,2 (AUTHOR), Ru, Jiasheng1,2 (AUTHOR)
Source: Metallurgical Research & Technology. 2025, Vol. 122 Issue 3, p1-10. 10p.
Subjects: Continuous casting, Grain refinement, Grain size, Scanning electron microscopy, Steel
Abstract: Coarse austenitic grains contribute to the heightened crack sensitivity in microalloyed steel. To better control austenite grain growth, this study focuses on Nb microalloyed steel and aims to optimise the grain growth process of continuous casting slabs through Gleeble-controlled thermal history experiments. The research investigates the influences of initial temperature, cooling rate during the primary phase change, and reheating temperature during the secondary phase change on grain refinement. Scanning electron microscopy and metallographic microscopy are employed for analysis. The results indicate that the optimal initial temperature for phase transformation is 1000 °C. As the cooling rate increases, the grain size initially decreases and then increases. The most effective cooling rate for phase transformation is identified as 5°C/s, which leads to the highest γ/α transition rate and carbon nitrides are found to be uniformly distributed within the grains. When the temperature of the secondary phase transformation reaches 1000 °C, the average austenite grain size is refined to 334.4 µm, and no significant mixed grain formations are observed. [ABSTRACT FROM AUTHOR]
Copyright of Metallurgical Research & Technology is the property of EDP Sciences and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Full text is not displayed to guests.
FullText Links:
  – Type: pdflink
Text:
  Availability: 1
Header DbId: egs
DbLabel: Engineering Source
An: 185604990
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Grain refinement of Nb microalloyed steel during continuous casting under different thermal profiles.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Zhou%2C+Zhongqi%22">Zhou, Zhongqi</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Xinyu%22">Li, Xinyu</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Meng%2C+Xiangning%22">Meng, Xiangning</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> mengxn@mail.neu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Sheng%2C+Yuewei%22">Sheng, Yuewei</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ru%2C+Jiasheng%22">Ru, Jiasheng</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Metallurgical+Research+%26+Technology%22">Metallurgical Research & Technology</searchLink>. 2025, Vol. 122 Issue 3, p1-10. 10p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Continuous+casting%22">Continuous casting</searchLink><br /><searchLink fieldCode="DE" term="%22Grain+refinement%22">Grain refinement</searchLink><br /><searchLink fieldCode="DE" term="%22Grain+size%22">Grain size</searchLink><br /><searchLink fieldCode="DE" term="%22Scanning+electron+microscopy%22">Scanning electron microscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Steel%22">Steel</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Coarse austenitic grains contribute to the heightened crack sensitivity in microalloyed steel. To better control austenite grain growth, this study focuses on Nb microalloyed steel and aims to optimise the grain growth process of continuous casting slabs through Gleeble-controlled thermal history experiments. The research investigates the influences of initial temperature, cooling rate during the primary phase change, and reheating temperature during the secondary phase change on grain refinement. Scanning electron microscopy and metallographic microscopy are employed for analysis. The results indicate that the optimal initial temperature for phase transformation is 1000 °C. As the cooling rate increases, the grain size initially decreases and then increases. The most effective cooling rate for phase transformation is identified as 5°C/s, which leads to the highest γ/α transition rate and carbon nitrides are found to be uniformly distributed within the grains. When the temperature of the secondary phase transformation reaches 1000 °C, the average austenite grain size is refined to 334.4 µm, and no significant mixed grain formations are observed. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Metallurgical Research & Technology is the property of EDP Sciences and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=185604990
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1051/metal/2025029
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 10
        StartPage: 1
    Subjects:
      – SubjectFull: Continuous casting
        Type: general
      – SubjectFull: Grain refinement
        Type: general
      – SubjectFull: Grain size
        Type: general
      – SubjectFull: Scanning electron microscopy
        Type: general
      – SubjectFull: Steel
        Type: general
    Titles:
      – TitleFull: Grain refinement of Nb microalloyed steel during continuous casting under different thermal profiles.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Zhou, Zhongqi
      – PersonEntity:
          Name:
            NameFull: Li, Xinyu
      – PersonEntity:
          Name:
            NameFull: Meng, Xiangning
      – PersonEntity:
          Name:
            NameFull: Sheng, Yuewei
      – PersonEntity:
          Name:
            NameFull: Ru, Jiasheng
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 01
              M: 05
              Text: 2025
              Type: published
              Y: 2025
          Identifiers:
            – Type: issn-print
              Value: 22713646
          Numbering:
            – Type: volume
              Value: 122
            – Type: issue
              Value: 3
          Titles:
            – TitleFull: Metallurgical Research & Technology
              Type: main
ResultId 1