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The 3‐dimensional structure of macrosegregation in continuously cast high‐carbon steel
Author(s) -
Abbott Trevor B.,
Hoyle Ian B.,
Woodyatt A. Stephen
Publication year - 1994
Publication title -
steel research
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0177-4832
DOI - 10.1002/srin.199400941
Subject(s) - equiaxed crystals , die (integrated circuit) , metallurgy , materials science , mechanical engineering , engineering , microstructure
Three‐dimensional segregation maps were obtained by serially sectioning rolled billets of high carbon steel. The sections were macroetched to reveal phosphorus segregation then digitised and combined using a computer. Volume rendering software was used to create images that represented views of continuously cast blooms with unsegregated steel transparent and macrosegregation opaque. The images showed the overall V‐structure of macrosegregation and channel like morphology of individual macrosegregates. Samples with a fully columnar structure and a mixed columnar‐equiaxed structure were compared. A large equiaxed zone disperses the macrosegregation over a wider area and increases the angle and length of channels. The observed structures suggest that macrosegregation forms through a combination of internal hot tearing and erosion of solid by flowing segregated liquid.