JOM

, Volume 66, Issue 9, pp 1711–1720 | Cite as

Control of Transverse Corner Cracks on Low-Carbon Steel Slabs

  • Lifeng Zhang
  • Xiaogang Yang
  • Shusen Li
  • Ming Li
  • Wei Ma
Article
First Online:
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Accepted:

Abstract

In this article, the formation mechanism of transverse corner cracks on a low-carbon steel continuous-casting slab was investigated. The factors influencing the transverse corner cracks were discussed. The hot ductility of the low-carbon steel within 600°C and 1250°C was detected using a thermal simulator Gleeble 1500 (Dynamic Systems, Inc., Poestenkill, NY) to determine the embrittling temperature range of the steel. The temperature of the slab varied with time, especially at the slab corner, and it was calculated and discussed. It was found that transverse corner cracks were generated on the ferrite films along grain boundaries, and there was little decarburization layer near the cracks. According to the calculated temperature at slab corner, the cooling water flow rate and cooling strategy were optimized by adjusting the cooling water flow rate at each spray cooling zone to avoid the embrittling temperature range at the bending and straightening segments of the caster. As a result, the transverse corner cracks were successfully weakened.

Keywords

Ferrite Austenite Secondary Cool Secondary Cool Zone Corner Crack 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Notes

Acknowledgements

The authors are grateful for support from the National Science Foundation China (Grants 51274034, 51334002, and U1360201), Beijing Key Laboratory of Green Recycling and Extraction of Metals (GREM), the Laboratory of Green Process Metallurgy and Modeling (GPM2), and the High Quality steel Consortium (HQSC) at the School of Metallurgical and Ecological Engineering at University of Science and Technology Beijing (USTB), China.

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Copyright information

© The Minerals, Metals & Materials Society 2014

Authors and Affiliations

  • Lifeng Zhang
    • 1
  • Xiaogang Yang
    • 1
  • Shusen Li
    • 1
    • 2
  • Ming Li
    • 1
    • 2
  • Wei Ma
    • 1
    • 2
  1. 1.Beijing Key Laboratory of Green Recycling and Extraction of Metals (GREM), School of Metallurgical and Ecological EngineeringUniversity of Science and Technology BeijingBeijingPeople’s Republic of China
  2. 2.Qian’an Steelmaking Co. Ltd., Shougang GroupQian’an CityPeople’s Republic of China

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