Effects of Cooling Rate on Growth Behavior of Austenite Phase during Peritectic Reaction in Iron-Carbon Binary Alloy

A model experiment of peritectic reaction during cooling of an iron-carbon binary alloy is performed by using a solid-liquid diffusion couple method, and the effects of cooling rate on the growth behavior of austenite phase is investigated. A numerical simulation of the growth process of austenite phase during the peritectic reaction also is performed by using the method previously proposed by the Present authors. Both the experimental and simulated results show that austenite phase formed at δ-ferrite/liquid interface grows into both δ-ferrite phase and liquid phase during cooling and that its growth rate increases with increasing cooling rate.