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Use of Directional Solidification for Improving Tubular Workpiece Quality of Different Cast Irons

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Metallurgist Aims and scope

A new efficient method of casting tubular billets by directional solidification without the use of a core is proposed making it possible to obtain a fine-grained dense structure of cast iron due to intensive onesided heat removal and excess supply to the solidification front of superheated liquid phase during the entire billet formation time in a metal water-cooled mold (crystallizer). It is shown that the method makes it possible to obtain a prescribed final cast iron structure by creating a certain cooling regime for castings outside the mold. In the positive effect of directional solidification of the melt inherited by iron a decisive role is played by the formation of a dense structure and a more dispersed carbide eutectic with a favorable carbide morphology, which determines the good cast iron wear resistance. The results of studies confirm that the new casting method provides production of workpieces with a prescribed phase composition and improved physical, mechanical, and operating properties. The effect is considered of various factors of the formation of workpieces from different types of cast iron: gray alloyed with lamellar graphite, high-strength and high-chromium, and also Niresist cast iron, on the structure, properties and service life of components for critical purposes of general, mining and oil refining engineering.

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Authors and Affiliations

  1. GNU Institute of Metal Technology, Belarus’ Academy of Sciences, Mogilev, Belarus

    V. F. Bevza & V. P. Grusha

  2. FGBOU VO St Petersburg Mining University, St Petersburg, Russia

    V. A. Krasnyi

Authors
  1. V. F. Bevza
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  2. V. P. Grusha
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  3. V. A. Krasnyi
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Corresponding author

Correspondence to V. F. Bevza.

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Translated from Metallurg, Vol. 62, No. 6, pp. 36–44, June, 2018.

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Bevza, V.F., Grusha, V.P. & Krasnyi, V.A. Use of Directional Solidification for Improving Tubular Workpiece Quality of Different Cast Irons. Metallurgist 62, 521–531 (2018). https://doi.org/10.1007/s11015-018-0689-8

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  • DOI: https://doi.org/10.1007/s11015-018-0689-8

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