Abstract
The metallurgical structure of a new family of cast irons has been studied in relationship to phase equilibria and solidification morphology. These alloys contain vanadium and chromium in proportions optimised to enhance, principally, the formation of eutectic VC carbides. Investigational work consisted of differential thermal analysis experiments, characterisation of the phases and directional solidification experiments. The stability of solidification carbides during a slow cooling process was examined. The effect of solidification rate was examined by measuring the average secondary arm dendrite spacings. A comparison was established with results for high carbon steels.
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