Citation:
C Reilly, N.R Green and M.R. Jolly. Surface oxide film entrainment mechanisms in shape casting running systems. Metallurgical and Materials Transactions B-Process Metallurgy and Materials, 2009, Volume 40, Issue 6, pp850-858
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 casting