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Unformatted text preview: temperature just slightly below 723°C contains 75% proeutectoid
ferrite. Compute the composition of the proeutectoid ferrite. (8 points)
A hypoeutectoid steel at a temperature just slightly below 723°C contains 25%
eutectoid ferrite. Compute the amount of eutectoid cementite. (10 points)
A hypereutectoid steel just below 723C contains 86.7% eutectoid ferrite.
Compute the amount of a) cementite and b) pearlite (15 points)
A 0.35 percent C plain-carbon steel is slowly cooled from about 950ºC to a
temperature just slightly below 723ºC. Calculate the weight percent pearlite
present in the steel. (12 points) Answers:
0.02% Carbon (if you had answered before the correction given during the
exam, I also considered other solutions as well)
a) total cementite = 13.3% , b) pearlite: 98.2%
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This note was uploaded on 01/23/2014 for the course CEE 60 taught by Professor P.j.m.monteiro during the Spring '12 term at Berkeley.
- Spring '12