Use the phase diagram provided in the class What composition

Use the phase diagram provided in the class. What composition should be selected that we can make pure austenite phase of steel at the lowest possible condition? In the TTT diagram of steel below, select one point at any location. Based on the point in the diagram, describe the corresponding heat treatment process and the expected product.

Solution

From the phase diagram, the composition of pure austenite phase is 0% of carbon at 912C

In the TTT diagram,

at the nose very fine pearlite forms, at lower temperature or higher under cooling finer pearlite forms.