Abstract
Under water cooling condition, the solidification structure is almost equiaxed grains, and the diameter of equiaxed grains is 0.5 mm~1mm, columnar grains are relative small, columnar grain width is only a few tenths of millimeters, with the length is 0.5 mm~1.5 mm. When the top heat transfer coefficient is 100 W/ (m 2 K), and the around and the bottom heat transfer coefficient are 2000 W/ (m 2 K)respectively, the solidification structure of the simulation computation is basically with experiment. the casting formed a symmetrical temperature field along the longitudinal section during solidification, the casting top grey area is solidifying contraction.
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