Structural-peritectic transformations in Cr-C and Fe-P melts.

Undercooling and the solidification processes of Fe-P and Cr-C melts with eutectic composition have been studied in this paper. It is shown that the equilibrium eutectics, α-Fe/Fe3P (for Fe83P17 melt) and α-Cr/Cr23C6 (for Cr86C14 melt), are formed at cooling the eutectic Fe-P and Cr-C liquid alloys from the melt temperatures lower than t* (t*= 1125°? for Fe83P17 and t°= 1610°C for Cr86C14) with the cooling rates interval from 20 to 100°C/min. The nonequilibrium eutectics, α-Fe/Fe2P (for Fe83P17) and α-Cr/Cr7C3 (for Cr86C14), are formed at cooling from the melt temperatures higher than t* and decomposed to equilibrium phases on further cooling. [ABSTRACT FROM AUTHOR]