The solidification of large ingots is simulated, and the results are confirmed in experiments. The application of cold-tapped direct-taper ingots is found to increase the ingot-to-product yield by 7% for the production of hollow billets and to decrease the degree of segregation heterogeneity in an ingot. The total car?bon segregation in a cold-tapped ingot is three times lower than that in a comparative ingot.
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