Abstract
The formation of exterior surface ripples, and their dependence on filling rate and superheat, was studied in bottom-poured ingots of low melting Sn-Pb alloys. It was found that surface waves in the liquid metal during mold filling are the basis for an important mechanism leading to formation of the primary exterior ripples. Imposition of a steady D. C. magnetic field strongly dampens the surface waves in the liquid metal, essentially eliminating the primary ripple marks throughout the bottom two-thirds of the ingots. The magnetic field also enhances columnar grain growth.
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E. N. ZULUETA, formerly Research Assistant at Massachusetts Institute of Technology.
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Stemple, D.K., Zulueta, E.N. & Flemings, M.C. Effect of wave motion on chill cast surfaces. Metall Trans B 13, 503–509 (1982). https://doi.org/10.1007/BF02667767
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DOI: https://doi.org/10.1007/BF02667767