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Mechanical Engineering · Q149

Engineering Materials

Engineering and GATE · Mechanical Engineering · question 149

Q149

Chilled cast iron has

A.
No graphite
Answer
B.
A very high percentage of graphite
C.
A low percentage of graphite
D.
Graphite as its basic constituent of composition

Answer: Option A

Solution

Answer: Option A
Solution:
Chilled cast iron. Iron-carbon alloy with low graphitization factor so that chill occurs forming a graphite-free structure.
The carbon is present bonded in the form of iron carbide, which is why the break surface of the material appears whitish instead of gray.
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