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Experimental Determination of Heat Transfer Within the Metal/Mold Gap in a DC Casting Mold: Part II. Effect of Casting Metal, Mold Material, and Other Casting Parameters

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Abstract

Extensive experimental studies were conducted to quantify the effect of different parameters that can affect the heat transfer from the metal to the mold during the steady-state phase of DC casting. In the first part previously published, the experimental technique was established and results were reported for the effect of gas type (atmosphere within the mold) and the gap between the metal and the mold. The results showed the significant effect of gas thermal conductivity and the metal-mold gap on the mold wall heat transfer coefficient. In this second publication on heat transfer in the mold wall region of a DC casting mold, the results from the effect of casting temperature, gas flow rate, casting alloy, mold material, and the mold insert material on the mold wall heat transfer coefficient are described. The experiments reported in the current paper show that these additional factors tested do not affect the heat flux through the mold wall to the same extent as the gap size or the gas type. The heat transfer coefficient changes by less than 5 pct when casting temperature is changed by ±25 K, less than 15 pct when the gas flow rate within the metal-mold gap flows at up to 3 LPM, and approximately 30 pct when the mold material is changed from stainless steel to AA601 to copper. Similar results were obtained when different insert materials were used. These results are explained with the help of an electrical analogy of heat transfer and are consistent with the heat transfer theory.

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Acknowledgments

The CAST CRC was established under, and is funded in part by, the Australian Federal Government’s Cooperative Research Centre scheme. Helpful discussions with Assoc. Prof. John Taylor at the University of Queensland are also acknowledged.

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Authors and Affiliations

  1. CAST CRC, Division of Materials, School of Mechanical & Mining Engineering, University of Queensland, Brisbane, QLD, 4072, Australia

    Arvind Prasad (Research Fellow) & Ian F. Bainbridge (Senior Research Consultant (Retd.)

Authors
  1. Arvind Prasad
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  2. Ian F. Bainbridge
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Correspondence to Arvind Prasad.

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Manuscript submitted September 9, 2011.

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Prasad, A., Bainbridge, I.F. Experimental Determination of Heat Transfer Within the Metal/Mold Gap in a DC Casting Mold: Part II. Effect of Casting Metal, Mold Material, and Other Casting Parameters. Metall Mater Trans A 44, 3099–3113 (2013). https://doi.org/10.1007/s11661-013-1646-6

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