Question 2 With the aid of the Iron - Iron Carbide/Graphite phase diagram (data sheet 1), Determine the phases, compositions, weight fractions and amounts of each phase for a 10 kg sample of a ferrous metal. Also draw and label the microstructure in each case. i) iii) iv) v) 0.5%C at 1400C. 0.5%C at 750C. 0.7%C at 722C 1.25%C at 900C. 1.5%C at 60C (30 marks) DATA SHEET 1: THE IRON-IRON CARBIDE IRON-GRAPHITE EQUILIBRIUM DIAGRAMS IRON IRON CARBIDE TRON GRAPIT TE 1600 MEL 1500 5-IRON 1400 1300 6 MET MELO CEMENTITE DREMELT: APHIE 1200 (0.) AUSTENITE i T 1100 TEMPERATURE 1000 AUSTENITE AND GEMENTELE OR AUSTENITE AND GRAPHITE 900 (Y) 1 800 FERFITE (a) 700 HO O H1025 1: Se 600 ORE FERRIT AND GRAPHITE HAL 500 4 5 6 6.7 CARBON CONTENT (wt.)