Study on the Dendrite Arm Spacing of S50C Steel Produced by CSP

  • Kai Liu
  • Shusen ChengEmail author
  • Jipeng Li
  • Yongping Feng
  • Ming Zou
  • Jian Xie
Conference paper
Part of the The Minerals, Metals & Materials Series book series (MMMS)


The as-cast structure always plays an important role in the formation of macrosegregation in steel products. In this study, the dendrite arm spacing of S50C steel in different positions on the slab produced without electromagnetic stirring by compact strip production) (CSP) was measured through the morphology obtained by LEXT OLS4100 laser scanning confocal microscope. The results show that: (1) the as-cast structure consisted of three zones: columnar zone, columnar to equiaxed transition (CET) zone, and equiaxed zone, among which the percentage of the equiaxed zone is about 12–13% and the CET zone is about 16%; (2) the range of λ1 for the primary dendrite arm spacing (PDAS) is 100–220 μm and that of λ2 for the secondary arm spacing (SDAS) is 60–120 μm, both of which show an increasing trend from the surface to the center of the slab; (3) the dendrite arms become coarsened from surface to the center of the slab; and (4) the cooling rate (ε) and permeability (KP) were calculated and the trend of ε decreases from surface to center of the slab, and the trend of KP increases, which means heavy segregation in the center of the slab.


Compact strip production (CSP) S50C steel As-cast structure Dendrite arm spacing 



The authors would like to thank the management of JISCO, China.


  1. 1.
    Cobo SJ, Sellars CM (2001) Microstructural evolution of austenite under conditions simulating thin slab casting and hot direct rolling. Ironmaking Steelmaking 28(3):230–236CrossRefGoogle Scholar
  2. 2.
    Pikkarainen T et al (2016) Effect of superheat on macrostructure and macrosegregation in continuous cast low-alloy steel slabs. In: 4th international conference on advances in solidification processes (ICASP-4)Google Scholar
  3. 3.
    Sung PK, Poirier DR et al (1990) Segregation of carbon and manganese in continuously cast high carbon steel for wire rod. Ironmaking Steelmaking 6:424–430Google Scholar
  4. 4.
    Morphology and segregation in continuously cast high carbon steel billets. ISIJ Int 47 (12):1759–1766 (2007)Google Scholar
  5. 5.
    Jacobi H, Schwerdtfeger K (1976) Metall Trans A 7A:811CrossRefGoogle Scholar
  6. 6.
    Kaspar R (2003) Microstructure aspects and optimization of thin slab direct rolling of steels. Steel Res 74(5):318–326CrossRefGoogle Scholar
  7. 7.
    Guo W, Zhu M (2009) Characteristic parameters for dendritic microstructure of solidification during slab continuous casting. J Iron Steel Res Int 16(1):17–21CrossRefGoogle Scholar
  8. 8.
    Wang CY, Ahuja S, Beckerman C, de Groh HC (1995) Metall Mater Trans B 26B:111–119CrossRefGoogle Scholar
  9. 9.
    Spittle JA, Brown SG (2005) Mater Sci Technol 21(9):1–7CrossRefGoogle Scholar
  10. 10.
    Pierer R, Bernhard C (2008) On the influence of carbon on secondary dendrite arm spacing in steel. J Mater Sci 43:6938–6943CrossRefGoogle Scholar

Copyright information

© The Minerals, Metals & Materials Society 2020

Authors and Affiliations

  • Kai Liu
    • 1
  • Shusen Cheng
    • 1
    Email author
  • Jipeng Li
    • 1
    • 2
  • Yongping Feng
    • 2
  • Ming Zou
    • 2
  • Jian Xie
    • 2
  1. 1.School of Metallurgical and Ecological EngineeringUniversity of Science and Technology BeijingBeijingChina
  2. 2.Gansu Jiu Steel Group Hongxing Iron & Steel Co., LtdJiayuguansChina

Personalised recommendations