14, pts) or the Fe Fe,c phase diagram, as seen below, answer the questions: 2,80

Question

14, pts) or the Fe Fe,c phase diagram, as seen below, answer the questions: 2,800 B 1,538 Liquid NYH Solidus L 1,148 2,098 1,674 G 912 a 1,341 Pearlie FeaC Q a pearlite Pearline Hype 4.3 6.7 0.77 DH-- Cast irons Steels Percent carbon What is the melting temperature in Celsius of pure iron? (2) What is the weight percentage of carbon in cementite? (3) What is the highest weight percentage of carbon for Ferrite? (4) What is the highest weight percentage of carbon for Austenite? (5) What is the eutectic temperature in Celsius? (6) What is the eutectoid point (using the letter on the diagram)? (7) At the point just below eutectic point, what are the mass fractions of the two phases (8)At d temperature, what are the mass fractions of ferrite and cementite?

Explanation / Answer

Sol: 1) Melting point of pure Iron is 1537 degree Celcius
   2)Weight % of Carbon in cementite is 6.66
   3)Weight % of Carbon in Ferrite is 0.035
4)Weight % of Carbon in Austenite is 1.7
   5)Eutectic tempetature is 1130 degree Celcius
   6) Q point
  

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