Explanation

In solid transformation, one solid phase is supersaturated to two or more other solid phases at the same time, and two or more phases are precipitated from the supersaturated phase at the same time. pearlite transformation in steel is a typical example of eutectoid reaction. Austenite is supersaturated with ferrite and carburizing at the same time, and transformation into a two-phase mixture of ferrite and carburizing lamellar nearly in parallel alternating arrangement. This structure is called pearlite.

Classification