Compositions Structure 0.25% Structure QUESTION 1 Compositions 0.83%C Temperature 3000 8+ 2720 2600 2552 8 Temperature y = Austenite C Q = Ferrite 8-Delto iron CM = Cementite 1539 1492 L CM begins 100 to solidifty Primary austenite Austenite in begins to liquid L+ Feyc 2066F 1130 1% 2400 2.2%C solidity 2200 2056 2000 Austenite solid solution of carbon in gamma iron 1800 670 1600 Magnetic 0414* FI 1/point Ag Az A 910 Austentite Feyc ledeburite and cementite Y Feyc Austenite Cementite and to pearlite A12,3 ledeburite [80 Marks] 400 333 9 1333 760 723 Q1-B explain the effect of increasing the carbon amount above 0.2% in steel. 1200 [40 Marks] 0.025 Pearlite and ferrite Pearlite and Cementite Cementite, pearlite and transformed a + Fec ledeburite Magnetic change of Feyc 1000 410-T 210 +0.000 0.50 4.3 6.67 1-0 A slowly cooled steel shows a microstructure containing 60% pearlite and 40% ferrite Estimate the carbon concentration in this alloy 11. Describe the microstructure that would be obtained if this metal is heated to 730C. Which phases and how much of each? 0.85% 14. 49 5% 6% 65% -Hypo-eutectoid-to-Hyper-eutectoid- Steel Figure 1 Fe/C phase diagram Cast Iron [40 Marks] Use the iron-carbon phase diagram (Figure 1) to answer the following questions. QIA Using the above figure, sketch neatly the microstructure of the alloys (given in the below table) at the room temperature and determine the amount of each phase presented