Abstract
Extensive investigations into the solidification structures of continuously cast steel demonstrate strong compositional effects, particularly by carbon and nickel. The columnar grain size first decreases with increasing carbon content, up to 0.10 C, then increases to a maximum at about 0.60% C, and then decreases again. Internal defects and surface characteristics change markedly also with carbon content and are affected by such operational variables as degree of superheat and electromagnetic stirring. The fundamental cause of the effect of carbon is the peritectic solidification; this is supported by very similar dependence of solidification structures on nickel content in iron-nickel alloys, where peritectic solidification also occurs.
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