Surface Oxide Film Entrainment Mechanisms in Shape Casting Running Systems

Article

Abstract

During the transient phase of filling a casting running system, surface turbulence can cause the entrainment of oxide films into the bulk liquid. Research has shown that these are detrimental to the material’s integrity. Common mechanisms for this entrainment include returning waves, arising during filling of the runner bar, and plunging jets, found when pouring into a basin. One of these, the returning wave, has been studied in greater depth, using real-time X-ray and process modeling techniques alongside the application of physical principals. It has been concluded that when developed, returning waves cannot attain the more stable and less entraining tranquil flow regime desirable in the running system of castings.

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Copyright information

© THE MINERALS, METALS & MATERIALS SOCIETY and ASM INTERNATIONAL 2009

Authors and Affiliations

  1. 1.School of Mechanical EngineeringUniversity of BirminghamBirminghamUnited Kingdom
  2. 2.School of Metallurgy and MaterialsUniversity of BirminghamBirminghamUnited Kingdom

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