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JOM

, Volume 36, Issue 3, pp 38–43 | Cite as

Continuous Casting of High-Alloy Steels

  • Katsuo Kinoshita
  • Yutaka Yoshii
  • Hidenari Kitaoka
  • Akira Kawaharada
  • Hiroshi Nishikawa
  • Osamu Tanigawa
Extractive & Process Metallurgy
  • 15 Downloads

Summary

A continuous casting process for high-alloy steels such as 13% Mn steel, 9% Ni steel, and stainless steels (AISI 631, AISI 310S) has been developed at Chiba Works of Kawasaki Steel Corp. Tensile testing at elevated temperatures and microscopic examination of the fractured surface of the corresponding steel specimen have shown that the high crack sensitivity of these grades is due to segregation and/or precipitation of sulfur and phosphorus at γ-grain boundaries, and for 9% Ni steel, additional large thermal expansion at γ/α transformation.

Decreasing the content of phosphorus and sulfur, making secondary cooling milder and widthwise even, and decreasing the rate of slab reheating have been shown to improve the occurrence of surface and subsurface cracks during continuous casting and hot rolling, making commercial production of these grades feasible.

Keywords

Continuous Casting Secondary Cool Subsurface Crack Steel Slab Secondary Cool Zone 
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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References

  1. 1.
    S. Suzuki, Y. Nakano, K. Hirose, T. Okumura, H. Nishikawa, and M. Sato, “Production of 9% Ni Steel Plates for Liquefied Natural Gas Tanks,” Kawasaki Steel Technical Report, No. 6, September 1982, p. 31.Google Scholar
  2. 2.
    K. Sorimachi, A. Kawaharada, K. Hamagami, K. Kinoshita, Y. Yoshii, and S. Shiraishi, “Continuous Casting of Special Steel Slabs,” Tetsu-to-Hagané, 67(8) (1981), p. 305.Google Scholar
  3. 3.
    H. Suzuki, T. Nishimura, T. Yamamoto, S. Mizoguchi, and T. Nakamura, “Mechanical Properties of Continuous Cast Materials at Elevated Temperatures,” Committee for Fundamental Research, ISIJ, February 1982.Google Scholar
  4. 4.
    C. J. Adams, “Hot Ductility and Strength of Strand Cast Steels up to Their Melting Points,” Proc. NOH-BOS Conference (AIME), 1971, 54, 290.Google Scholar

Copyright information

© The Minerals, Metals & Materials Society 1984

Authors and Affiliations

  • Katsuo Kinoshita
    • 1
  • Yutaka Yoshii
    • 2
  • Hidenari Kitaoka
    • 2
  • Akira Kawaharada
    • 3
  • Hiroshi Nishikawa
    • 3
  • Osamu Tanigawa
    • 3
  1. 1.Research Laboratory 1, Mizushima Research Department, Research LaboratoriesKawasaki Steel CorporationOkayamaJapan
  2. 2.Research LaboratoriesKawasaki Steel CorporationChibaJapan
  3. 3.Steelmaking DivisionChiba Works, Kawasaki Steel CorporationChibaJapan

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