The steel section of the Fe-C phase diagram is shown in Figure. Q5, with the aid of this phase diagram, answer the following questions. 1100 1000 Temperature (C) 900 800 700 600 500 400 0.022 y. Austenile a, Ferrite 0.77 a + Fe,c y + Fe, C 1.0 Composition (wt%) Figure Q.5. The steel portion of the Fe-C system 727C 2.0 With the aid of the Fe-C diagram (Figure Q5), For medium carbon steel (0.35%C), determine: The temperature at which austenite first begins to transform on cooling. II. The primary constituents (phases) that form III. The composition and amount of each phase present at 728C. IV. The composition and amount of each phase present at 720-

The steel section of the Fe-C phase diagram is shown in Figure. Q5, with the aid of this phase diagram, answer the following questions. With the aid of the Fe-C diagram (Figure Q5), For medium carbon steel (0.35%C), determine: 1. The temperature at which austenite first begins to transform on cooling. II. The primary constituents (phases) that form III. The composition and amount of each phase present at 728C. IV. The composition and amount of each phase present at 720