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Optimizing Mold Lubrication for High-Speed Continuous Casting of Slabs

  • Extractive & Process Metallurgy
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Summary

The mechanism of slag flow from meniscus into slit has been studied at Kawasaki Steel Corp. (KSC) through cold model experiments for simulation and visualization of mold lubrication in the continuous casting machine. The shape of the meniscus periphery changed depending upon the thickness of the slit and the condition of mold oscillation. It became clear that the oscillation marks were formed at the lowest point of the down stroke of the mold oscillation.

Furthermore, the frictional force between the slab and the mold was measured by means of load cells equipped on supporting pins of the oscillating table. The influence of both the withdrawal speed and the properties of the casting powders on the value of the frictional force has been determined. Frictional force versus withdrawal speed curves are shown to exhibit a minimum at a certain speed for a given casting powder.

From these results, the optimum condition of mold lubrication for high-speed continuous casting of slabs have been discussed in order to prevent both surface defects and breakouts.

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References

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Authors and Affiliations

  1. Research Department-I, Research Laboratories, Kawasaki Steel Corp., Kawasaki-cho 1, Chiba 260, Japan

    Hakaru Nakato (Senior Researcher of Steelmaking Research Laboratories), Yasuhiro Habu (Chief), Toshihiko Emi (General Manager) & Kazuhisa Hamagami (Assistant Manager of Steelmaking Dept.)

  2. Mizushima Works, Kawasaki Steel Corp., Kawasaki-dori 1-chome, Mizushima, Kurashiki 721, Japan

    Shigeru Ōmiya (Assistant Manager of Steelmaking Dept.)

  3. Technology Department, Tubarão Project Division, Kawasaki Steel Corp., Rua Chapot Presvot, 685, Praia do Canto, Vitoria-ES, Brazil

    Takao Koshikawa (Staff Manager of Operation Guidance Team)

Authors
  1. Hakaru Nakato
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  2. Shigeru Ōmiya
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  3. Yasuhiro Habu
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  4. Toshihiko Emi
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  5. Kazuhisa Hamagami
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  6. Takao Koshikawa
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Additional information

Mr. Nakato graduated from Iron and Steel Technical College in 1967 and joined Steelmaking Research Laboratories, Kawasaki Steel until 1977. He completed his studies on a visiting research associateship at Nagoya University and resumed his previous position in 1979. He is currently involved in development of solidification processing of steel.

Mr. Ohmiya received his M-Eng in metallurgy from Tohoku University and joined the Steelmaking Dept. of Mizushima Works, Kawasaki Steel Corporation in 1976. In 1981, he completed a two-year visiting research associateship at Max Plank Institute and T. U. Claushtahl, West Germany. He is currently an assistant manager in charge of development of continuous casting technology.

Dr. Habu graduated from Osaka University with a B-Eng in metallurgy in 1962 and then joined the Steelmaking Research Laboratories, Kawasaki Steel. He received his PhD in 1977 and has been chief of the Steelmaking Laboratories since 1982.

Dr. Emi graduated from Osaka University with a B-Eng in metallurgy in 1958 joined the Steelmaking Research Laboratories, Kawasaki Steel Corp. until 1965. He completed a two-year visiting research associateship at Hokkaido University in 1967 where he received his PhD in physical chemistry. He then worked at Universities of Pennsylvania and Michigan as a postdoctoral fellow. After resuming his previous position at KSC in 1970, he was appointed chief, Steelmaking Laboratories in 1979 and has been in charge of general management, Research Department-I, Research Laboratories, Kopersince 1982, supervising ironmaking, steelmaking, inorganic materials, and powder metallurgy laboratories.

Mr. Hamagami received his M-Eng from Tokyo Institute of Technology in metallurgy and joined the Steelmaking Dept., Chiba Works, Kawasaki Steel, in 1976. He is currently an assistant manager in charge of operation and development on continuous casting.

Mr. Koshikawa graduated from Tohoku University (B-Eng in metallurgy) in 1962 and joined Steelmaking Dept., Chiba Works, Kawasaki Steel Corp. He was appointed manager, Steelmaking Dept., Chiba Works in 1977. Since 1983, he has been currently a staff manager of the team in Tubarao Project Division.

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Nakato, H., Ōmiya, S., Habu, Y. et al. Optimizing Mold Lubrication for High-Speed Continuous Casting of Slabs. JOM 36, 44–50 (1984). https://doi.org/10.1007/BF03338407

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  • DOI: https://doi.org/10.1007/BF03338407

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