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← HistoryWhich process increases in cast iron production when water quenches molten material?
A)Ferrite grain size increases
B)Cementite formation predominates✓
C)Graphite nodules become coarser
D)Austenite phase becomes stabilized
💡 Explanation
Rapid quenching induces cementite formation because it prevents carbon diffusion necessary for graphite formation; therefore, cementite (Fe3C), a hard, brittle phase increases rather than graphite, ferrite or austenite which require slower cooling rates under near-equilibrium conditions.
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